diff options
Diffstat (limited to 'vm/Init.cpp')
-rw-r--r-- | vm/Init.cpp | 1859 |
1 files changed, 1859 insertions, 0 deletions
diff --git a/vm/Init.cpp b/vm/Init.cpp new file mode 100644 index 0000000..36ac269 --- /dev/null +++ b/vm/Init.cpp @@ -0,0 +1,1859 @@ +/* + * Copyright (C) 2008 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* + * Dalvik initialization, shutdown, and command-line argument processing. + */ +#define __STDC_LIMIT_MACROS +#include <stdlib.h> +#include <stdio.h> +#include <signal.h> +#include <limits.h> +#include <ctype.h> +#include <sys/wait.h> +#include <unistd.h> + +#include "Dalvik.h" +#include "test/Test.h" +#include "mterp/Mterp.h" +#include "Hash.h" + +#define kMinHeapStartSize (1*1024*1024) +#define kMinHeapSize (2*1024*1024) +#define kMaxHeapSize (1*1024*1024*1024) + +/* + * Register VM-agnostic native methods for system classes. + */ +extern int jniRegisterSystemMethods(JNIEnv* env); + +/* fwd */ +static bool registerSystemNatives(JNIEnv* pEnv); +static bool initJdwp(); +static bool initZygote(); + + +/* global state */ +struct DvmGlobals gDvm; +struct DvmJniGlobals gDvmJni; + +/* JIT-specific global state */ +#if defined(WITH_JIT) +struct DvmJitGlobals gDvmJit; + +#if defined(WITH_JIT_TUNING) +/* + * Track the number of hits in the inline cache for predicted chaining. + * Use an ugly global variable here since it is accessed in assembly code. + */ +int gDvmICHitCount; +#endif + +#endif + +/* + * Show usage. + * + * We follow the tradition of unhyphenated compound words. + */ +static void usage(const char* progName) +{ + dvmFprintf(stderr, "%s: [options] class [argument ...]\n", progName); + dvmFprintf(stderr, "%s: [options] -jar file.jar [argument ...]\n",progName); + dvmFprintf(stderr, "\n"); + dvmFprintf(stderr, "The following standard options are recognized:\n"); + dvmFprintf(stderr, " -classpath classpath\n"); + dvmFprintf(stderr, " -Dproperty=value\n"); + dvmFprintf(stderr, " -verbose:tag ('gc', 'jni', or 'class')\n"); + dvmFprintf(stderr, " -ea[:<package name>... |:<class name>]\n"); + dvmFprintf(stderr, " -da[:<package name>... |:<class name>]\n"); + dvmFprintf(stderr, " (-enableassertions, -disableassertions)\n"); + dvmFprintf(stderr, " -esa\n"); + dvmFprintf(stderr, " -dsa\n"); + dvmFprintf(stderr, + " (-enablesystemassertions, -disablesystemassertions)\n"); + dvmFprintf(stderr, " -showversion\n"); + dvmFprintf(stderr, " -help\n"); + dvmFprintf(stderr, "\n"); + dvmFprintf(stderr, "The following extended options are recognized:\n"); + dvmFprintf(stderr, " -Xrunjdwp:<options>\n"); + dvmFprintf(stderr, " -Xbootclasspath:bootclasspath\n"); + dvmFprintf(stderr, " -Xcheck:tag (e.g. 'jni')\n"); + dvmFprintf(stderr, " -XmsN (min heap, must be multiple of 1K, >= 1MB)\n"); + dvmFprintf(stderr, " -XmxN (max heap, must be multiple of 1K, >= 2MB)\n"); + dvmFprintf(stderr, " -XssN (stack size, >= %dKB, <= %dKB)\n", + kMinStackSize / 1024, kMaxStackSize / 1024); + dvmFprintf(stderr, " -Xverify:{none,remote,all}\n"); + dvmFprintf(stderr, " -Xrs\n"); +#if defined(WITH_JIT) + dvmFprintf(stderr, + " -Xint (extended to accept ':portable', ':fast' and ':jit')\n"); +#else + dvmFprintf(stderr, + " -Xint (extended to accept ':portable' and ':fast')\n"); +#endif + dvmFprintf(stderr, "\n"); + dvmFprintf(stderr, "These are unique to Dalvik:\n"); + dvmFprintf(stderr, " -Xzygote\n"); + dvmFprintf(stderr, " -Xdexopt:{none,verified,all,full}\n"); + dvmFprintf(stderr, " -Xnoquithandler\n"); + dvmFprintf(stderr, + " -Xjnigreflimit:N (must be multiple of 100, >= 200)\n"); + dvmFprintf(stderr, " -Xjniopts:{warnonly,forcecopy}\n"); + dvmFprintf(stderr, " -Xjnitrace:substring (eg NativeClass or nativeMethod)\n"); + dvmFprintf(stderr, " -Xstacktracefile:<filename>\n"); + dvmFprintf(stderr, " -Xgc:[no]precise\n"); + dvmFprintf(stderr, " -Xgc:[no]preverify\n"); + dvmFprintf(stderr, " -Xgc:[no]postverify\n"); + dvmFprintf(stderr, " -Xgc:[no]concurrent\n"); + dvmFprintf(stderr, " -Xgc:[no]verifycardtable\n"); + dvmFprintf(stderr, " -XX:+DisableExplicitGC\n"); + dvmFprintf(stderr, " -X[no]genregmap\n"); + dvmFprintf(stderr, " -Xverifyopt:[no]checkmon\n"); + dvmFprintf(stderr, " -Xcheckdexsum\n"); +#if defined(WITH_JIT) + dvmFprintf(stderr, " -Xincludeselectedop\n"); + dvmFprintf(stderr, " -Xjitop:hexopvalue[-endvalue]" + "[,hexopvalue[-endvalue]]*\n"); + dvmFprintf(stderr, " -Xincludeselectedmethod\n"); + dvmFprintf(stderr, " -Xjitthreshold:decimalvalue\n"); + dvmFprintf(stderr, " -Xjitblocking\n"); + dvmFprintf(stderr, " -Xjitmethod:signature[,signature]* " + "(eg Ljava/lang/String\\;replace)\n"); + dvmFprintf(stderr, " -Xjitcheckcg\n"); + dvmFprintf(stderr, " -Xjitverbose\n"); + dvmFprintf(stderr, " -Xjitprofile\n"); + dvmFprintf(stderr, " -Xjitdisableopt\n"); + dvmFprintf(stderr, " -Xjitsuspendpoll\n"); +#endif + dvmFprintf(stderr, "\n"); + dvmFprintf(stderr, "Configured with:" + " debugger" + " profiler" + " hprof" +#ifdef WITH_TRACKREF_CHECKS + " trackref_checks" +#endif +#ifdef WITH_INSTR_CHECKS + " instr_checks" +#endif +#ifdef WITH_EXTRA_OBJECT_VALIDATION + " extra_object_validation" +#endif +#ifdef WITH_EXTRA_GC_CHECKS + " extra_gc_checks" +#endif +#if !defined(NDEBUG) && defined(WITH_DALVIK_ASSERT) + " dalvik_assert" +#endif +#ifdef WITH_JNI_STACK_CHECK + " jni_stack_check" +#endif +#ifdef EASY_GDB + " easy_gdb" +#endif +#ifdef CHECK_MUTEX + " check_mutex" +#endif +#if defined(WITH_JIT) + " jit(" ARCH_VARIANT ")" +#endif +#if defined(WITH_SELF_VERIFICATION) + " self_verification" +#endif +#if ANDROID_SMP != 0 + " smp" +#endif + ); +#ifdef DVM_SHOW_EXCEPTION + dvmFprintf(stderr, " show_exception=%d", DVM_SHOW_EXCEPTION); +#endif + dvmFprintf(stderr, "\n\n"); +} + +/* + * Show helpful information on JDWP options. + */ +static void showJdwpHelp() +{ + dvmFprintf(stderr, + "Example: -Xrunjdwp:transport=dt_socket,address=8000,server=y\n"); + dvmFprintf(stderr, + "Example: -Xrunjdwp:transport=dt_socket,address=localhost:6500,server=n\n"); +} + +/* + * Show version and copyright info. + */ +static void showVersion() +{ + dvmFprintf(stdout, "DalvikVM version %d.%d.%d\n", + DALVIK_MAJOR_VERSION, DALVIK_MINOR_VERSION, DALVIK_BUG_VERSION); + dvmFprintf(stdout, + "Copyright (C) 2007 The Android Open Source Project\n\n" + "This software is built from source code licensed under the " + "Apache License,\n" + "Version 2.0 (the \"License\"). You may obtain a copy of the " + "License at\n\n" + " http://www.apache.org/licenses/LICENSE-2.0\n\n" + "See the associated NOTICE file for this software for further " + "details.\n"); +} + +/* + * Parse a string of the form /[0-9]+[kKmMgG]?/, which is used to specify + * memory sizes. [kK] indicates kilobytes, [mM] megabytes, and + * [gG] gigabytes. + * + * "s" should point just past the "-Xm?" part of the string. + * "min" specifies the lowest acceptable value described by "s". + * "div" specifies a divisor, e.g. 1024 if the value must be a multiple + * of 1024. + * + * The spec says the -Xmx and -Xms options must be multiples of 1024. It + * doesn't say anything about -Xss. + * + * Returns 0 (a useless size) if "s" is malformed or specifies a low or + * non-evenly-divisible value. + */ +static size_t parseMemOption(const char *s, size_t div) +{ + /* strtoul accepts a leading [+-], which we don't want, + * so make sure our string starts with a decimal digit. + */ + if (isdigit(*s)) { + const char *s2; + size_t val; + + val = strtoul(s, (char **)&s2, 10); + if (s2 != s) { + /* s2 should be pointing just after the number. + * If this is the end of the string, the user + * has specified a number of bytes. Otherwise, + * there should be exactly one more character + * that specifies a multiplier. + */ + if (*s2 != '\0') { + char c; + + /* The remainder of the string is either a single multiplier + * character, or nothing to indicate that the value is in + * bytes. + */ + c = *s2++; + if (*s2 == '\0') { + size_t mul; + + if (c == '\0') { + mul = 1; + } else if (c == 'k' || c == 'K') { + mul = 1024; + } else if (c == 'm' || c == 'M') { + mul = 1024 * 1024; + } else if (c == 'g' || c == 'G') { + mul = 1024 * 1024 * 1024; + } else { + /* Unknown multiplier character. + */ + return 0; + } + + if (val <= SIZE_MAX / mul) { + val *= mul; + } else { + /* Clamp to a multiple of 1024. + */ + val = SIZE_MAX & ~(1024-1); + } + } else { + /* There's more than one character after the + * numeric part. + */ + return 0; + } + } + + /* The man page says that a -Xm value must be + * a multiple of 1024. + */ + if (val % div == 0) { + return val; + } + } + } + + return 0; +} + +/* + * Handle one of the JDWP name/value pairs. + * + * JDWP options are: + * help: if specified, show help message and bail + * transport: may be dt_socket or dt_shmem + * address: for dt_socket, "host:port", or just "port" when listening + * server: if "y", wait for debugger to attach; if "n", attach to debugger + * timeout: how long to wait for debugger to connect / listen + * + * Useful with server=n (these aren't supported yet): + * onthrow=<exception-name>: connect to debugger when exception thrown + * onuncaught=y|n: connect to debugger when uncaught exception thrown + * launch=<command-line>: launch the debugger itself + * + * The "transport" option is required, as is "address" if server=n. + */ +static bool handleJdwpOption(const char* name, const char* value) +{ + if (strcmp(name, "transport") == 0) { + if (strcmp(value, "dt_socket") == 0) { + gDvm.jdwpTransport = kJdwpTransportSocket; + } else if (strcmp(value, "dt_android_adb") == 0) { + gDvm.jdwpTransport = kJdwpTransportAndroidAdb; + } else { + LOGE("JDWP transport '%s' not supported", value); + return false; + } + } else if (strcmp(name, "server") == 0) { + if (*value == 'n') + gDvm.jdwpServer = false; + else if (*value == 'y') + gDvm.jdwpServer = true; + else { + LOGE("JDWP option 'server' must be 'y' or 'n'"); + return false; + } + } else if (strcmp(name, "suspend") == 0) { + if (*value == 'n') + gDvm.jdwpSuspend = false; + else if (*value == 'y') + gDvm.jdwpSuspend = true; + else { + LOGE("JDWP option 'suspend' must be 'y' or 'n'"); + return false; + } + } else if (strcmp(name, "address") == 0) { + /* this is either <port> or <host>:<port> */ + const char* colon = strchr(value, ':'); + char* end; + long port; + + if (colon != NULL) { + free(gDvm.jdwpHost); + gDvm.jdwpHost = (char*) malloc(colon - value +1); + strncpy(gDvm.jdwpHost, value, colon - value +1); + gDvm.jdwpHost[colon-value] = '\0'; + value = colon + 1; + } + if (*value == '\0') { + LOGE("JDWP address missing port"); + return false; + } + port = strtol(value, &end, 10); + if (*end != '\0') { + LOGE("JDWP address has junk in port field '%s'", value); + return false; + } + gDvm.jdwpPort = port; + } else if (strcmp(name, "launch") == 0 || + strcmp(name, "onthrow") == 0 || + strcmp(name, "oncaught") == 0 || + strcmp(name, "timeout") == 0) + { + /* valid but unsupported */ + LOGI("Ignoring JDWP option '%s'='%s'", name, value); + } else { + LOGI("Ignoring unrecognized JDWP option '%s'='%s'", name, value); + } + + return true; +} + +/* + * Parse the latter half of a -Xrunjdwp/-agentlib:jdwp= string, e.g.: + * "transport=dt_socket,address=8000,server=y,suspend=n" + */ +static bool parseJdwpOptions(const char* str) +{ + char* mangle = strdup(str); + char* name = mangle; + bool result = false; + + /* + * Process all of the name=value pairs. + */ + while (true) { + char* value; + char* comma; + + value = strchr(name, '='); + if (value == NULL) { + LOGE("JDWP opts: garbage at '%s'", name); + goto bail; + } + + comma = strchr(name, ','); // use name, not value, for safety + if (comma != NULL) { + if (comma < value) { + LOGE("JDWP opts: found comma before '=' in '%s'", mangle); + goto bail; + } + *comma = '\0'; + } + + *value++ = '\0'; // stomp the '=' + + if (!handleJdwpOption(name, value)) + goto bail; + + if (comma == NULL) { + /* out of options */ + break; + } + name = comma+1; + } + + /* + * Make sure the combination of arguments makes sense. + */ + if (gDvm.jdwpTransport == kJdwpTransportUnknown) { + LOGE("JDWP opts: must specify transport"); + goto bail; + } + if (!gDvm.jdwpServer && (gDvm.jdwpHost == NULL || gDvm.jdwpPort == 0)) { + LOGE("JDWP opts: when server=n, must specify host and port"); + goto bail; + } + // transport mandatory + // outbound server address + + gDvm.jdwpConfigured = true; + result = true; + +bail: + free(mangle); + return result; +} + +/* + * Handle one of the four kinds of assertion arguments. + * + * "pkgOrClass" is the last part of an enable/disable line. For a package + * the arg looks like "-ea:com.google.fubar...", for a class it looks + * like "-ea:com.google.fubar.Wahoo". The string we get starts at the ':'. + * + * For system assertions (-esa/-dsa), "pkgOrClass" is NULL. + * + * Multiple instances of these arguments can be specified, e.g. you can + * enable assertions for a package and then disable them for one class in + * the package. + */ +static bool enableAssertions(const char* pkgOrClass, bool enable) +{ + AssertionControl* pCtrl = &gDvm.assertionCtrl[gDvm.assertionCtrlCount++]; + pCtrl->enable = enable; + + if (pkgOrClass == NULL) { + /* enable or disable for all system classes */ + pCtrl->isPackage = false; + pCtrl->pkgOrClass = NULL; + pCtrl->pkgOrClassLen = 0; + } else { + if (*pkgOrClass == '\0') { + /* global enable/disable for all but system */ + pCtrl->isPackage = false; + pCtrl->pkgOrClass = strdup(""); + pCtrl->pkgOrClassLen = 0; + } else { + pCtrl->pkgOrClass = dvmDotToSlash(pkgOrClass+1); // skip ':' + if (pCtrl->pkgOrClass == NULL) { + /* can happen if class name includes an illegal '/' */ + LOGW("Unable to process assertion arg '%s'", pkgOrClass); + return false; + } + + int len = strlen(pCtrl->pkgOrClass); + if (len >= 3 && strcmp(pCtrl->pkgOrClass + len-3, "///") == 0) { + /* mark as package, truncate two of the three slashes */ + pCtrl->isPackage = true; + *(pCtrl->pkgOrClass + len-2) = '\0'; + pCtrl->pkgOrClassLen = len - 2; + } else { + /* just a class */ + pCtrl->isPackage = false; + pCtrl->pkgOrClassLen = len; + } + } + } + + return true; +} + +/* + * Turn assertions on when requested to do so by the Zygote. + * + * This is a bit sketchy. We can't (easily) go back and fiddle with all + * of the classes that have already been initialized, so this only + * affects classes that have yet to be loaded. If some or all assertions + * have been enabled through some other means, we don't want to mess with + * it here, so we do nothing. Finally, we assume that there's room in + * "assertionCtrl" to hold at least one entry; this is guaranteed by the + * allocator. + * + * This must only be called from the main thread during zygote init. + */ +void dvmLateEnableAssertions() +{ + if (gDvm.assertionCtrl == NULL) { + LOGD("Not late-enabling assertions: no assertionCtrl array"); + return; + } else if (gDvm.assertionCtrlCount != 0) { + LOGD("Not late-enabling assertions: some asserts already configured"); + return; + } + LOGD("Late-enabling assertions"); + + /* global enable for all but system */ + AssertionControl* pCtrl = gDvm.assertionCtrl; + pCtrl->pkgOrClass = strdup(""); + pCtrl->pkgOrClassLen = 0; + pCtrl->isPackage = false; + pCtrl->enable = true; + gDvm.assertionCtrlCount = 1; +} + + +/* + * Release memory associated with the AssertionCtrl array. + */ +static void freeAssertionCtrl() +{ + int i; + + for (i = 0; i < gDvm.assertionCtrlCount; i++) + free(gDvm.assertionCtrl[i].pkgOrClass); + free(gDvm.assertionCtrl); +} + +#if defined(WITH_JIT) +/* Parse -Xjitop to selectively turn on/off certain opcodes for JIT */ +static void processXjitop(const char *opt) +{ + if (opt[7] == ':') { + const char *startPtr = &opt[8]; + char *endPtr = NULL; + + do { + long startValue, endValue; + + startValue = strtol(startPtr, &endPtr, 16); + if (startPtr != endPtr) { + /* Just in case value is out of range */ + startValue %= kNumPackedOpcodes; + + if (*endPtr == '-') { + endValue = strtol(endPtr+1, &endPtr, 16); + endValue %= kNumPackedOpcodes; + } else { + endValue = startValue; + } + + for (; startValue <= endValue; startValue++) { + LOGW("Dalvik opcode %x is selected for debugging", + (unsigned int) startValue); + /* Mark the corresponding bit to 1 */ + gDvmJit.opList[startValue >> 3] |= 1 << (startValue & 0x7); + } + + if (*endPtr == 0) { + break; + } + + startPtr = endPtr + 1; + + continue; + } else { + if (*endPtr != 0) { + dvmFprintf(stderr, + "Warning: Unrecognized opcode value substring " + "%s\n", endPtr); + } + break; + } + } while (1); + } else { + int i; + for (i = 0; i < (kNumPackedOpcodes+7)/8; i++) { + gDvmJit.opList[i] = 0xff; + } + dvmFprintf(stderr, "Warning: select all opcodes\n"); + } +} + +/* Parse -Xjitmethod to selectively turn on/off certain methods for JIT */ +static void processXjitmethod(const char *opt) +{ + char *buf = strdup(&opt[12]); + char *start, *end; + + gDvmJit.methodTable = dvmHashTableCreate(8, NULL); + + start = buf; + /* + * Break comma-separated method signatures and enter them into the hash + * table individually. + */ + do { + int hashValue; + + end = strchr(start, ','); + if (end) { + *end = 0; + } + + hashValue = dvmComputeUtf8Hash(start); + + dvmHashTableLookup(gDvmJit.methodTable, hashValue, + strdup(start), + (HashCompareFunc) strcmp, true); + if (end) { + start = end + 1; + } else { + break; + } + } while (1); + free(buf); +} +#endif + +/* + * Process an argument vector full of options. Unlike standard C programs, + * argv[0] does not contain the name of the program. + * + * If "ignoreUnrecognized" is set, we ignore options starting with "-X" or "_" + * that we don't recognize. Otherwise, we return with an error as soon as + * we see anything we can't identify. + * + * Returns 0 on success, -1 on failure, and 1 for the special case of + * "-version" where we want to stop without showing an error message. + */ +static int processOptions(int argc, const char* const argv[], + bool ignoreUnrecognized) +{ + int i; + + LOGV("VM options (%d):", argc); + for (i = 0; i < argc; i++) + LOGV(" %d: '%s'", i, argv[i]); + + /* + * Over-allocate AssertionControl array for convenience. If allocated, + * the array must be able to hold at least one entry, so that the + * zygote-time activation can do its business. + */ + assert(gDvm.assertionCtrl == NULL); + if (argc > 0) { + gDvm.assertionCtrl = + (AssertionControl*) malloc(sizeof(AssertionControl) * argc); + if (gDvm.assertionCtrl == NULL) + return -1; + assert(gDvm.assertionCtrlCount == 0); + } + + for (i = 0; i < argc; i++) { + if (strcmp(argv[i], "-help") == 0) { + /* show usage and stop */ + return -1; + + } else if (strcmp(argv[i], "-version") == 0) { + /* show version and stop */ + showVersion(); + return 1; + } else if (strcmp(argv[i], "-showversion") == 0) { + /* show version and continue */ + showVersion(); + + } else if (strcmp(argv[i], "-classpath") == 0 || + strcmp(argv[i], "-cp") == 0) + { + /* set classpath */ + if (i == argc-1) { + dvmFprintf(stderr, "Missing classpath path list\n"); + return -1; + } + free(gDvm.classPathStr); /* in case we have compiled-in default */ + gDvm.classPathStr = strdup(argv[++i]); + + } else if (strncmp(argv[i], "-Xbootclasspath:", + sizeof("-Xbootclasspath:")-1) == 0) + { + /* set bootclasspath */ + const char* path = argv[i] + sizeof("-Xbootclasspath:")-1; + + if (*path == '\0') { + dvmFprintf(stderr, "Missing bootclasspath path list\n"); + return -1; + } + free(gDvm.bootClassPathStr); + gDvm.bootClassPathStr = strdup(path); + + } else if (strncmp(argv[i], "-Xbootclasspath/a:", + sizeof("-Xbootclasspath/a:")-1) == 0) { + const char* appPath = argv[i] + sizeof("-Xbootclasspath/a:")-1; + + if (*(appPath) == '\0') { + dvmFprintf(stderr, "Missing appending bootclasspath path list\n"); + return -1; + } + char* allPath; + + if (asprintf(&allPath, "%s:%s", gDvm.bootClassPathStr, appPath) < 0) { + dvmFprintf(stderr, "Can't append to bootclasspath path list\n"); + return -1; + } + free(gDvm.bootClassPathStr); + gDvm.bootClassPathStr = allPath; + + } else if (strncmp(argv[i], "-Xbootclasspath/p:", + sizeof("-Xbootclasspath/p:")-1) == 0) { + const char* prePath = argv[i] + sizeof("-Xbootclasspath/p:")-1; + + if (*(prePath) == '\0') { + dvmFprintf(stderr, "Missing prepending bootclasspath path list\n"); + return -1; + } + char* allPath; + + if (asprintf(&allPath, "%s:%s", prePath, gDvm.bootClassPathStr) < 0) { + dvmFprintf(stderr, "Can't prepend to bootclasspath path list\n"); + return -1; + } + free(gDvm.bootClassPathStr); + gDvm.bootClassPathStr = allPath; + + } else if (strncmp(argv[i], "-D", 2) == 0) { + /* Properties are handled in managed code. We just check syntax. */ + if (strchr(argv[i], '=') == NULL) { + dvmFprintf(stderr, "Bad system property setting: \"%s\"\n", + argv[i]); + return -1; + } + gDvm.properties->push_back(argv[i] + 2); + + } else if (strcmp(argv[i], "-jar") == 0) { + // TODO: handle this; name of jar should be in argv[i+1] + dvmFprintf(stderr, "-jar not yet handled\n"); + assert(false); + + } else if (strncmp(argv[i], "-Xms", 4) == 0) { + size_t val = parseMemOption(argv[i]+4, 1024); + if (val != 0) { + if (val >= kMinHeapStartSize && val <= kMaxHeapSize) { + gDvm.heapStartingSize = val; + } else { + dvmFprintf(stderr, + "Invalid -Xms '%s', range is %dKB to %dKB\n", + argv[i], kMinHeapStartSize/1024, kMaxHeapSize/1024); + return -1; + } + } else { + dvmFprintf(stderr, "Invalid -Xms option '%s'\n", argv[i]); + return -1; + } + } else if (strncmp(argv[i], "-Xmx", 4) == 0) { + size_t val = parseMemOption(argv[i]+4, 1024); + if (val != 0) { + if (val >= kMinHeapSize && val <= kMaxHeapSize) { + gDvm.heapMaximumSize = val; + } else { + dvmFprintf(stderr, + "Invalid -Xmx '%s', range is %dKB to %dKB\n", + argv[i], kMinHeapSize/1024, kMaxHeapSize/1024); + return -1; + } + } else { + dvmFprintf(stderr, "Invalid -Xmx option '%s'\n", argv[i]); + return -1; + } + } else if (strncmp(argv[i], "-XX:HeapGrowthLimit=", 20) == 0) { + size_t val = parseMemOption(argv[i] + 20, 1024); + if (val != 0) { + gDvm.heapGrowthLimit = val; + } else { + dvmFprintf(stderr, "Invalid -XX:HeapGrowthLimit option '%s'\n", argv[i]); + return -1; + } + } else if (strncmp(argv[i], "-Xss", 4) == 0) { + size_t val = parseMemOption(argv[i]+4, 1); + if (val != 0) { + if (val >= kMinStackSize && val <= kMaxStackSize) { + gDvm.stackSize = val; + } else { + dvmFprintf(stderr, "Invalid -Xss '%s', range is %d to %d\n", + argv[i], kMinStackSize, kMaxStackSize); + return -1; + } + } else { + dvmFprintf(stderr, "Invalid -Xss option '%s'\n", argv[i]); + return -1; + } + + } else if (strncmp(argv[i], "-XX:+DisableExplicitGC", 22) == 0) { + gDvm.disableExplicitGc = true; + } else if (strcmp(argv[i], "-verbose") == 0 || + strcmp(argv[i], "-verbose:class") == 0) + { + // JNI spec says "-verbose:gc,class" is valid, but cmd line + // doesn't work that way; may want to support. + gDvm.verboseClass = true; + } else if (strcmp(argv[i], "-verbose:jni") == 0) { + gDvm.verboseJni = true; + } else if (strcmp(argv[i], "-verbose:gc") == 0) { + gDvm.verboseGc = true; + } else if (strcmp(argv[i], "-verbose:shutdown") == 0) { + gDvm.verboseShutdown = true; + + } else if (strncmp(argv[i], "-enableassertions", 17) == 0) { + enableAssertions(argv[i] + 17, true); + } else if (strncmp(argv[i], "-ea", 3) == 0) { + enableAssertions(argv[i] + 3, true); + } else if (strncmp(argv[i], "-disableassertions", 18) == 0) { + enableAssertions(argv[i] + 18, false); + } else if (strncmp(argv[i], "-da", 3) == 0) { + enableAssertions(argv[i] + 3, false); + } else if (strcmp(argv[i], "-enablesystemassertions") == 0 || + strcmp(argv[i], "-esa") == 0) + { + enableAssertions(NULL, true); + } else if (strcmp(argv[i], "-disablesystemassertions") == 0 || + strcmp(argv[i], "-dsa") == 0) + { + enableAssertions(NULL, false); + + } else if (strncmp(argv[i], "-Xcheck:jni", 11) == 0) { + /* nothing to do now -- was handled during JNI init */ + + } else if (strcmp(argv[i], "-Xdebug") == 0) { + /* accept but ignore */ + + } else if (strncmp(argv[i], "-Xrunjdwp:", 10) == 0 || + strncmp(argv[i], "-agentlib:jdwp=", 15) == 0) + { + const char* tail; + + if (argv[i][1] == 'X') + tail = argv[i] + 10; + else + tail = argv[i] + 15; + + if (strncmp(tail, "help", 4) == 0 || !parseJdwpOptions(tail)) { + showJdwpHelp(); + return 1; + } + } else if (strcmp(argv[i], "-Xrs") == 0) { + gDvm.reduceSignals = true; + } else if (strcmp(argv[i], "-Xnoquithandler") == 0) { + /* disables SIGQUIT handler thread while still blocking SIGQUIT */ + /* (useful if we don't want thread but system still signals us) */ + gDvm.noQuitHandler = true; + } else if (strcmp(argv[i], "-Xzygote") == 0) { + gDvm.zygote = true; +#if defined(WITH_JIT) + gDvmJit.runningInAndroidFramework = true; +#endif + } else if (strncmp(argv[i], "-Xdexopt:", 9) == 0) { + if (strcmp(argv[i] + 9, "none") == 0) + gDvm.dexOptMode = OPTIMIZE_MODE_NONE; + else if (strcmp(argv[i] + 9, "verified") == 0) + gDvm.dexOptMode = OPTIMIZE_MODE_VERIFIED; + else if (strcmp(argv[i] + 9, "all") == 0) + gDvm.dexOptMode = OPTIMIZE_MODE_ALL; + else if (strcmp(argv[i] + 9, "full") == 0) + gDvm.dexOptMode = OPTIMIZE_MODE_FULL; + else { + dvmFprintf(stderr, "Unrecognized dexopt option '%s'\n",argv[i]); + return -1; + } + } else if (strncmp(argv[i], "-Xverify:", 9) == 0) { + if (strcmp(argv[i] + 9, "none") == 0) + gDvm.classVerifyMode = VERIFY_MODE_NONE; + else if (strcmp(argv[i] + 9, "remote") == 0) + gDvm.classVerifyMode = VERIFY_MODE_REMOTE; + else if (strcmp(argv[i] + 9, "all") == 0) + gDvm.classVerifyMode = VERIFY_MODE_ALL; + else { + dvmFprintf(stderr, "Unrecognized verify option '%s'\n",argv[i]); + return -1; + } + } else if (strncmp(argv[i], "-Xjnigreflimit:", 15) == 0) { + int lim = atoi(argv[i] + 15); + if (lim < 200 || (lim % 100) != 0) { + dvmFprintf(stderr, "Bad value for -Xjnigreflimit: '%s'\n", + argv[i]+15); + return -1; + } + gDvm.jniGrefLimit = lim; + } else if (strncmp(argv[i], "-Xjnitrace:", 11) == 0) { + gDvm.jniTrace = strdup(argv[i] + 11); + } else if (strcmp(argv[i], "-Xlog-stdio") == 0) { + gDvm.logStdio = true; + + } else if (strncmp(argv[i], "-Xint", 5) == 0) { + if (argv[i][5] == ':') { + if (strcmp(argv[i] + 6, "portable") == 0) + gDvm.executionMode = kExecutionModeInterpPortable; + else if (strcmp(argv[i] + 6, "fast") == 0) + gDvm.executionMode = kExecutionModeInterpFast; +#ifdef WITH_JIT + else if (strcmp(argv[i] + 6, "jit") == 0) + gDvm.executionMode = kExecutionModeJit; +#endif + else { + dvmFprintf(stderr, + "Warning: Unrecognized interpreter mode %s\n",argv[i]); + /* keep going */ + } + } else { + /* disable JIT if it was enabled by default */ + gDvm.executionMode = kExecutionModeInterpFast; + } + + } else if (strncmp(argv[i], "-Xlockprofthreshold:", 20) == 0) { + gDvm.lockProfThreshold = atoi(argv[i] + 20); + +#ifdef WITH_JIT + } else if (strncmp(argv[i], "-Xjitop", 7) == 0) { + processXjitop(argv[i]); + } else if (strncmp(argv[i], "-Xjitmethod", 11) == 0) { + processXjitmethod(argv[i]); + } else if (strncmp(argv[i], "-Xjitblocking", 13) == 0) { + gDvmJit.blockingMode = true; + } else if (strncmp(argv[i], "-Xjitthreshold:", 15) == 0) { + gDvmJit.threshold = atoi(argv[i] + 15); + } else if (strncmp(argv[i], "-Xincludeselectedop", 19) == 0) { + gDvmJit.includeSelectedOp = true; + } else if (strncmp(argv[i], "-Xincludeselectedmethod", 23) == 0) { + gDvmJit.includeSelectedMethod = true; + } else if (strncmp(argv[i], "-Xjitcheckcg", 12) == 0) { + gDvmJit.checkCallGraph = true; + /* Need to enable blocking mode due to stack crawling */ + gDvmJit.blockingMode = true; + } else if (strncmp(argv[i], "-Xjitverbose", 12) == 0) { + gDvmJit.printMe = true; + } else if (strncmp(argv[i], "-Xjitprofile", 12) == 0) { + gDvmJit.profileMode = kTraceProfilingContinuous; + } else if (strncmp(argv[i], "-Xjitdisableopt", 15) == 0) { + /* Disable selected optimizations */ + if (argv[i][15] == ':') { + sscanf(argv[i] + 16, "%x", &gDvmJit.disableOpt); + /* Disable all optimizations */ + } else { + gDvmJit.disableOpt = -1; + } + } else if (strncmp(argv[i], "-Xjitsuspendpoll", 16) == 0) { + gDvmJit.genSuspendPoll = true; +#endif + + } else if (strncmp(argv[i], "-Xstacktracefile:", 17) == 0) { + gDvm.stackTraceFile = strdup(argv[i]+17); + + } else if (strcmp(argv[i], "-Xgenregmap") == 0) { + gDvm.generateRegisterMaps = true; + } else if (strcmp(argv[i], "-Xnogenregmap") == 0) { + gDvm.generateRegisterMaps = false; + + } else if (strcmp(argv[i], "Xverifyopt:checkmon") == 0) { + gDvm.monitorVerification = true; + } else if (strcmp(argv[i], "Xverifyopt:nocheckmon") == 0) { + gDvm.monitorVerification = false; + + } else if (strncmp(argv[i], "-Xgc:", 5) == 0) { + if (strcmp(argv[i] + 5, "precise") == 0) + gDvm.preciseGc = true; + else if (strcmp(argv[i] + 5, "noprecise") == 0) + gDvm.preciseGc = false; + else if (strcmp(argv[i] + 5, "preverify") == 0) + gDvm.preVerify = true; + else if (strcmp(argv[i] + 5, "nopreverify") == 0) + gDvm.preVerify = false; + else if (strcmp(argv[i] + 5, "postverify") == 0) + gDvm.postVerify = true; + else if (strcmp(argv[i] + 5, "nopostverify") == 0) + gDvm.postVerify = false; + else if (strcmp(argv[i] + 5, "concurrent") == 0) + gDvm.concurrentMarkSweep = true; + else if (strcmp(argv[i] + 5, "noconcurrent") == 0) + gDvm.concurrentMarkSweep = false; + else if (strcmp(argv[i] + 5, "verifycardtable") == 0) + gDvm.verifyCardTable = true; + else if (strcmp(argv[i] + 5, "noverifycardtable") == 0) + gDvm.verifyCardTable = false; + else { + dvmFprintf(stderr, "Bad value for -Xgc"); + return -1; + } + LOGV("Precise GC configured %s", gDvm.preciseGc ? "ON" : "OFF"); + + } else if (strcmp(argv[i], "-Xcheckdexsum") == 0) { + gDvm.verifyDexChecksum = true; + + } else if (strcmp(argv[i], "-Xprofile:threadcpuclock") == 0) { + gDvm.profilerClockSource = kProfilerClockSourceThreadCpu; + } else if (strcmp(argv[i], "-Xprofile:wallclock") == 0) { + gDvm.profilerClockSource = kProfilerClockSourceWall; + } else if (strcmp(argv[i], "-Xprofile:dualclock") == 0) { + gDvm.profilerClockSource = kProfilerClockSourceDual; + + } else { + if (!ignoreUnrecognized) { + dvmFprintf(stderr, "Unrecognized option '%s'\n", argv[i]); + return -1; + } + } + } + + return 0; +} + +/* + * Set defaults for fields altered or modified by arguments. + * + * Globals are initialized to 0 (a/k/a NULL or false). + */ +static void setCommandLineDefaults() +{ + const char* envStr = getenv("CLASSPATH"); + if (envStr != NULL) { + gDvm.classPathStr = strdup(envStr); + } else { + gDvm.classPathStr = strdup("."); + } + envStr = getenv("BOOTCLASSPATH"); + if (envStr != NULL) { + gDvm.bootClassPathStr = strdup(envStr); + } else { + gDvm.bootClassPathStr = strdup("."); + } + + gDvm.properties = new std::vector<std::string>(); + + /* Defaults overridden by -Xms and -Xmx. + * TODO: base these on a system or application-specific default + */ + gDvm.heapStartingSize = 2 * 1024 * 1024; // Spec says 16MB; too big for us. + gDvm.heapMaximumSize = 16 * 1024 * 1024; // Spec says 75% physical mem + gDvm.heapGrowthLimit = 0; // 0 means no growth limit + gDvm.stackSize = kDefaultStackSize; + + gDvm.concurrentMarkSweep = true; + + /* gDvm.jdwpSuspend = true; */ + + /* allowed unless zygote config doesn't allow it */ + gDvm.jdwpAllowed = true; + + /* default verification and optimization modes */ + gDvm.classVerifyMode = VERIFY_MODE_ALL; + gDvm.dexOptMode = OPTIMIZE_MODE_VERIFIED; + gDvm.monitorVerification = false; + gDvm.generateRegisterMaps = true; + gDvm.registerMapMode = kRegisterMapModeTypePrecise; + + /* + * Default execution mode. + * + * This should probably interact with the mterp code somehow, e.g. if + * we know we're using the "desktop" build we should probably be + * using "portable" rather than "fast". + */ +#if defined(WITH_JIT) + gDvm.executionMode = kExecutionModeJit; +#else + gDvm.executionMode = kExecutionModeInterpFast; +#endif + + /* + * SMP support is a compile-time define, but we may want to have + * dexopt target a differently-configured device. + */ + gDvm.dexOptForSmp = (ANDROID_SMP != 0); + + /* + * Default profiler configuration. + */ + gDvm.profilerClockSource = kProfilerClockSourceDual; +} + + +/* + * Handle a SIGBUS, which frequently occurs because somebody replaced an + * optimized DEX file out from under us. + */ +static void busCatcher(int signum, siginfo_t* info, void* context) +{ + void* addr = info->si_addr; + + LOGE("Caught a SIGBUS (%d), addr=%p", signum, addr); + + /* + * If we return at this point the SIGBUS just keeps happening, so we + * remove the signal handler and allow it to kill us. TODO: restore + * the original, which points to a debuggerd stub; if we don't then + * debuggerd won't be notified. + */ + signal(SIGBUS, SIG_DFL); +} + +/* + * Configure signals. We need to block SIGQUIT so that the signal only + * reaches the dump-stack-trace thread. + * + * This can be disabled with the "-Xrs" flag. + */ +static void blockSignals() +{ + sigset_t mask; + int cc; + + sigemptyset(&mask); + sigaddset(&mask, SIGQUIT); + sigaddset(&mask, SIGUSR1); // used to initiate heap dump +#if defined(WITH_JIT) && defined(WITH_JIT_TUNING) + sigaddset(&mask, SIGUSR2); // used to investigate JIT internals +#endif + //sigaddset(&mask, SIGPIPE); + cc = sigprocmask(SIG_BLOCK, &mask, NULL); + assert(cc == 0); + + if (false) { + /* TODO: save the old sigaction in a global */ + struct sigaction sa; + memset(&sa, 0, sizeof(sa)); + sa.sa_sigaction = busCatcher; + sa.sa_flags = SA_SIGINFO; + cc = sigaction(SIGBUS, &sa, NULL); + assert(cc == 0); + } +} + +class ScopedShutdown { +public: + ScopedShutdown() : armed_(true) { + } + + ~ScopedShutdown() { + if (armed_) { + dvmShutdown(); + } + } + + void disarm() { + armed_ = false; + } + +private: + bool armed_; +}; + +/* + * VM initialization. Pass in any options provided on the command line. + * Do not pass in the class name or the options for the class. + * + * Returns 0 on success. + */ +std::string dvmStartup(int argc, const char* const argv[], + bool ignoreUnrecognized, JNIEnv* pEnv) +{ + ScopedShutdown scopedShutdown; + + assert(gDvm.initializing); + + LOGV("VM init args (%d):", argc); + for (int i = 0; i < argc; i++) { + LOGV(" %d: '%s'", i, argv[i]); + } + setCommandLineDefaults(); + + /* + * Process the option flags (if any). + */ + int cc = processOptions(argc, argv, ignoreUnrecognized); + if (cc != 0) { + if (cc < 0) { + dvmFprintf(stderr, "\n"); + usage("dalvikvm"); + } + return "syntax error"; + } + +#if WITH_EXTRA_GC_CHECKS > 1 + /* only "portable" interp has the extra goodies */ + if (gDvm.executionMode != kExecutionModeInterpPortable) { + LOGI("Switching to 'portable' interpreter for GC checks"); + gDvm.executionMode = kExecutionModeInterpPortable; + } +#endif + + /* Configure group scheduling capabilities */ + if (!access("/dev/cpuctl/tasks", F_OK)) { + LOGV("Using kernel group scheduling"); + gDvm.kernelGroupScheduling = 1; + } else { + LOGV("Using kernel scheduler policies"); + } + + /* configure signal handling */ + if (!gDvm.reduceSignals) + blockSignals(); + + /* verify system page size */ + if (sysconf(_SC_PAGESIZE) != SYSTEM_PAGE_SIZE) { + return StringPrintf("expected page size %d, got %d", + SYSTEM_PAGE_SIZE, (int) sysconf(_SC_PAGESIZE)); + } + + /* mterp setup */ + LOGV("Using executionMode %d", gDvm.executionMode); + dvmCheckAsmConstants(); + + /* + * Initialize components. + */ + if (!dvmAllocTrackerStartup()) { + return "dvmAllocTrackerStartup failed"; + } + if (!dvmGcStartup()) { + return "dvmGcStartup failed"; + } + if (!dvmThreadStartup()) { + return "dvmThreadStartup failed"; + } + if (!dvmInlineNativeStartup()) { + return "dvmInlineNativeStartup"; + } + if (!dvmRegisterMapStartup()) { + return "dvmRegisterMapStartup failed"; + } + if (!dvmInstanceofStartup()) { + return "dvmInstanceofStartup failed"; + } + if (!dvmClassStartup()) { + return "dvmClassStartup failed"; + } + + /* + * At this point, the system is guaranteed to be sufficiently + * initialized that we can look up classes and class members. This + * call populates the gDvm instance with all the class and member + * references that the VM wants to use directly. + */ + if (!dvmFindRequiredClassesAndMembers()) { + return "dvmFindRequiredClassesAndMembers failed"; + } + + if (!dvmStringInternStartup()) { + return "dvmStringInternStartup failed"; + } + if (!dvmNativeStartup()) { + return "dvmNativeStartup failed"; + } + if (!dvmInternalNativeStartup()) { + return "dvmInternalNativeStartup failed"; + } + if (!dvmJniStartup()) { + return "dvmJniStartup failed"; + } + if (!dvmProfilingStartup()) { + return "dvmProfilingStartup failed"; + } + + /* + * Create a table of methods for which we will substitute an "inline" + * version for performance. + */ + if (!dvmCreateInlineSubsTable()) { + return "dvmCreateInlineSubsTable failed"; + } + + /* + * Miscellaneous class library validation. + */ + if (!dvmValidateBoxClasses()) { + return "dvmValidateBoxClasses failed"; + } + + /* + * Do the last bits of Thread struct initialization we need to allow + * JNI calls to work. + */ + if (!dvmPrepMainForJni(pEnv)) { + return "dvmPrepMainForJni failed"; + } + + /* + * Explicitly initialize java.lang.Class. This doesn't happen + * automatically because it's allocated specially (it's an instance + * of itself). Must happen before registration of system natives, + * which make some calls that throw assertions if the classes they + * operate on aren't initialized. + */ + if (!dvmInitClass(gDvm.classJavaLangClass)) { + return "couldn't initialized java.lang.Class"; + } + + /* + * Register the system native methods, which are registered through JNI. + */ + if (!registerSystemNatives(pEnv)) { + return "couldn't register system natives"; + } + + /* + * Do some "late" initialization for the memory allocator. This may + * allocate storage and initialize classes. + */ + if (!dvmCreateStockExceptions()) { + return "dvmCreateStockExceptions failed"; + } + + /* + * At this point, the VM is in a pretty good state. Finish prep on + * the main thread (specifically, create a java.lang.Thread object to go + * along with our Thread struct). Note we will probably be executing + * some interpreted class initializer code in here. + */ + if (!dvmPrepMainThread()) { + return "dvmPrepMainThread failed"; + } + + /* + * Make sure we haven't accumulated any tracked references. The main + * thread should be starting with a clean slate. + */ + if (dvmReferenceTableEntries(&dvmThreadSelf()->internalLocalRefTable) != 0) + { + LOGW("Warning: tracked references remain post-initialization"); + dvmDumpReferenceTable(&dvmThreadSelf()->internalLocalRefTable, "MAIN"); + } + + /* general debugging setup */ + if (!dvmDebuggerStartup()) { + return "dvmDebuggerStartup failed"; + } + + if (!dvmGcStartupClasses()) { + return "dvmGcStartupClasses failed"; + } + + /* + * Init for either zygote mode or non-zygote mode. The key difference + * is that we don't start any additional threads in Zygote mode. + */ + if (gDvm.zygote) { + if (!initZygote()) { + return "initZygote failed"; + } + } else { + if (!dvmInitAfterZygote()) { + return "dvmInitAfterZygote failed"; + } + } + + +#ifndef NDEBUG + if (!dvmTestHash()) + LOGE("dvmTestHash FAILED"); + if (false /*noisy!*/ && !dvmTestIndirectRefTable()) + LOGE("dvmTestIndirectRefTable FAILED"); +#endif + + if (dvmCheckException(dvmThreadSelf())) { + dvmLogExceptionStackTrace(); + return "Exception pending at end of VM initialization"; + } + + scopedShutdown.disarm(); + return ""; +} + +/* + * Register java.* natives from our class libraries. We need to do + * this after we're ready for JNI registration calls, but before we + * do any class initialization. + * + * If we get this wrong, we will blow up in the ThreadGroup class init if + * interpreted code makes any reference to System. It will likely do this + * since it wants to do some java.io.File setup (e.g. for static in/out/err). + * + * We need to have gDvm.initializing raised here so that JNI FindClass + * won't try to use the system/application class loader. + */ +static bool registerSystemNatives(JNIEnv* pEnv) +{ + Thread* self; + + /* main thread is always first in list */ + self = gDvm.threadList; + + /* must set this before allowing JNI-based method registration */ + self->status = THREAD_NATIVE; + + if (jniRegisterSystemMethods(pEnv) < 0) { + LOGE("jniRegisterSystemMethods failed"); + return false; + } + + /* back to run mode */ + self->status = THREAD_RUNNING; + + return true; +} + + +/* + * Do zygote-mode-only initialization. + */ +static bool initZygote() +{ + /* zygote goes into its own process group */ + setpgid(0,0); + + return true; +} + +/* + * Do non-zygote-mode initialization. This is done during VM init for + * standard startup, or after a "zygote fork" when creating a new process. + */ +bool dvmInitAfterZygote() +{ + u8 startHeap, startQuit, startJdwp; + u8 endHeap, endQuit, endJdwp; + + startHeap = dvmGetRelativeTimeUsec(); + + /* + * Post-zygote heap initialization, including starting + * the HeapWorker thread. + */ + if (!dvmGcStartupAfterZygote()) + return false; + + endHeap = dvmGetRelativeTimeUsec(); + startQuit = dvmGetRelativeTimeUsec(); + + /* start signal catcher thread that dumps stacks on SIGQUIT */ + if (!gDvm.reduceSignals && !gDvm.noQuitHandler) { + if (!dvmSignalCatcherStartup()) + return false; + } + + /* start stdout/stderr copier, if requested */ + if (gDvm.logStdio) { + if (!dvmStdioConverterStartup()) + return false; + } + + endQuit = dvmGetRelativeTimeUsec(); + startJdwp = dvmGetRelativeTimeUsec(); + + /* + * Start JDWP thread. If the command-line debugger flags specified + * "suspend=y", this will pause the VM. We probably want this to + * come last. + */ + if (!initJdwp()) { + LOGD("JDWP init failed; continuing anyway"); + } + + endJdwp = dvmGetRelativeTimeUsec(); + + LOGV("thread-start heap=%d quit=%d jdwp=%d total=%d usec", + (int)(endHeap-startHeap), (int)(endQuit-startQuit), + (int)(endJdwp-startJdwp), (int)(endJdwp-startHeap)); + +#ifdef WITH_JIT + if (gDvm.executionMode == kExecutionModeJit) { + if (!dvmCompilerStartup()) + return false; + } +#endif + + return true; +} + +/* + * Prepare for a connection to a JDWP-compliant debugger. + * + * Note this needs to happen fairly late in the startup process, because + * we need to have all of the java.* native methods registered (which in + * turn requires JNI to be fully prepped). + * + * There are several ways to initialize: + * server=n + * We immediately try to connect to host:port. Bail on failure. On + * success, send VM_START (suspending the VM if "suspend=y"). + * server=y suspend=n + * Passively listen for a debugger to connect. Return immediately. + * server=y suspend=y + * Wait until debugger connects. Send VM_START ASAP, suspending the + * VM after the message is sent. + * + * This gets more complicated with a nonzero value for "timeout". + */ +static bool initJdwp() +{ + assert(!gDvm.zygote); + + /* + * Init JDWP if the debugger is enabled. This may connect out to a + * debugger, passively listen for a debugger, or block waiting for a + * debugger. + */ + if (gDvm.jdwpAllowed && gDvm.jdwpConfigured) { + JdwpStartupParams params; + + if (gDvm.jdwpHost != NULL) { + if (strlen(gDvm.jdwpHost) >= sizeof(params.host)-1) { + LOGE("ERROR: hostname too long: '%s'", gDvm.jdwpHost); + return false; + } + strcpy(params.host, gDvm.jdwpHost); + } else { + params.host[0] = '\0'; + } + params.transport = gDvm.jdwpTransport; + params.server = gDvm.jdwpServer; + params.suspend = gDvm.jdwpSuspend; + params.port = gDvm.jdwpPort; + + gDvm.jdwpState = dvmJdwpStartup(¶ms); + if (gDvm.jdwpState == NULL) { + LOGW("WARNING: debugger thread failed to initialize"); + /* TODO: ignore? fail? need to mimic "expected" behavior */ + } + } + + /* + * If a debugger has already attached, send the "welcome" message. This + * may cause us to suspend all threads. + */ + if (dvmJdwpIsActive(gDvm.jdwpState)) { + //dvmChangeStatus(NULL, THREAD_RUNNING); + if (!dvmJdwpPostVMStart(gDvm.jdwpState, gDvm.jdwpSuspend)) { + LOGW("WARNING: failed to post 'start' message to debugger"); + /* keep going */ + } + //dvmChangeStatus(NULL, THREAD_NATIVE); + } + + return true; +} + +/* + * An alternative to JNI_CreateJavaVM/dvmStartup that does the first bit + * of initialization and then returns with "initializing" still set. (Used + * by DexOpt command-line utility.) + * + * Attempting to use JNI or internal natives will fail. It's best + * if no bytecode gets executed, which means no <clinit>, which means + * no exception-throwing. (In practice we need to initialize Class and + * Object, and probably some exception classes.) + * + * Returns 0 on success. + */ +int dvmPrepForDexOpt(const char* bootClassPath, DexOptimizerMode dexOptMode, + DexClassVerifyMode verifyMode, int dexoptFlags) +{ + gDvm.initializing = true; + gDvm.optimizing = true; + + /* configure signal handling */ + blockSignals(); + + /* set some defaults */ + setCommandLineDefaults(); + free(gDvm.bootClassPathStr); + gDvm.bootClassPathStr = strdup(bootClassPath); + + /* set opt/verify modes */ + gDvm.dexOptMode = dexOptMode; + gDvm.classVerifyMode = verifyMode; + gDvm.generateRegisterMaps = (dexoptFlags & DEXOPT_GEN_REGISTER_MAPS) != 0; + if (dexoptFlags & DEXOPT_SMP) { + assert((dexoptFlags & DEXOPT_UNIPROCESSOR) == 0); + gDvm.dexOptForSmp = true; + } else if (dexoptFlags & DEXOPT_UNIPROCESSOR) { + gDvm.dexOptForSmp = false; + } else { + gDvm.dexOptForSmp = (ANDROID_SMP != 0); + } + + /* + * Initialize the heap, some basic thread control mutexes, and + * get the bootclasspath prepped. + * + * We can't load any classes yet because we may not yet have a source + * for things like java.lang.Object and java.lang.Class. + */ + if (!dvmGcStartup()) + goto fail; + if (!dvmThreadStartup()) + goto fail; + if (!dvmInlineNativeStartup()) + goto fail; + if (!dvmRegisterMapStartup()) + goto fail; + if (!dvmInstanceofStartup()) + goto fail; + if (!dvmClassStartup()) + goto fail; + + /* + * We leave gDvm.initializing set to "true" so that, if we're not + * able to process the "core" classes, we don't go into a death-spin + * trying to throw a "class not found" exception. + */ + + return 0; + +fail: + dvmShutdown(); + return 1; +} + + +/* + * All threads have stopped. Finish the shutdown procedure. + * + * We can also be called if startup fails partway through, so be prepared + * to deal with partially initialized data. + * + * Free any storage allocated in gGlobals. + * + * We can't dlclose() shared libs we've loaded, because it's possible a + * thread not associated with the VM is running code in one. + * + * This is called from the JNI DestroyJavaVM function, which can be + * called from any thread. (In practice, this will usually run in the + * same thread that started the VM, a/k/a the main thread, but we don't + * want to assume that.) + */ +void dvmShutdown() +{ + LOGV("VM shutting down"); + + if (CALC_CACHE_STATS) + dvmDumpAtomicCacheStats(gDvm.instanceofCache); + + /* + * Stop our internal threads. + */ + dvmGcThreadShutdown(); + + if (gDvm.jdwpState != NULL) + dvmJdwpShutdown(gDvm.jdwpState); + free(gDvm.jdwpHost); + gDvm.jdwpHost = NULL; + free(gDvm.jniTrace); + gDvm.jniTrace = NULL; + free(gDvm.stackTraceFile); + gDvm.stackTraceFile = NULL; + + /* tell signal catcher to shut down if it was started */ + dvmSignalCatcherShutdown(); + + /* shut down stdout/stderr conversion */ + dvmStdioConverterShutdown(); + +#ifdef WITH_JIT + if (gDvm.executionMode == kExecutionModeJit) { + /* shut down the compiler thread */ + dvmCompilerShutdown(); + } +#endif + + /* + * Kill any daemon threads that still exist. Actively-running threads + * are likely to crash the process if they continue to execute while + * the VM shuts down. + */ + dvmSlayDaemons(); + + if (gDvm.verboseShutdown) + LOGD("VM cleaning up"); + + dvmDebuggerShutdown(); + dvmProfilingShutdown(); + dvmJniShutdown(); + dvmStringInternShutdown(); + dvmThreadShutdown(); + dvmClassShutdown(); + dvmRegisterMapShutdown(); + dvmInstanceofShutdown(); + dvmInlineNativeShutdown(); + dvmGcShutdown(); + dvmAllocTrackerShutdown(); + + /* these must happen AFTER dvmClassShutdown has walked through class data */ + dvmNativeShutdown(); + dvmInternalNativeShutdown(); + + dvmFreeInlineSubsTable(); + + free(gDvm.bootClassPathStr); + free(gDvm.classPathStr); + delete gDvm.properties; + + freeAssertionCtrl(); + + /* + * We want valgrind to report anything we forget to free as "definitely + * lost". If there's a pointer in the global chunk, it would be reported + * as "still reachable". Erasing the memory fixes this. + * + * This must be erased to zero if we want to restart the VM within this + * process. + */ + memset(&gDvm, 0xcd, sizeof(gDvm)); +} + + +/* + * fprintf() wrapper that calls through the JNI-specified vfprintf hook if + * one was specified. + */ +int dvmFprintf(FILE* fp, const char* format, ...) +{ + va_list args; + int result; + + va_start(args, format); + if (gDvm.vfprintfHook != NULL) + result = (*gDvm.vfprintfHook)(fp, format, args); + else + result = vfprintf(fp, format, args); + va_end(args); + + return result; +} + +#ifdef __GLIBC__ +#include <execinfo.h> +/* + * glibc-only stack dump function. Requires link with "--export-dynamic". + * + * TODO: move this into libs/cutils and make it work for all platforms. + */ +void dvmPrintNativeBackTrace() +{ + size_t MAX_STACK_FRAMES = 64; + void* stackFrames[MAX_STACK_FRAMES]; + size_t frameCount = backtrace(stackFrames, MAX_STACK_FRAMES); + + /* + * TODO: in practice, we may find that we should use backtrace_symbols_fd + * to avoid allocation, rather than use our own custom formatting. + */ + char** strings = backtrace_symbols(stackFrames, frameCount); + if (strings == NULL) { + LOGE("backtrace_symbols failed: %s", strerror(errno)); + return; + } + + size_t i; + for (i = 0; i < frameCount; ++i) { + LOGW("#%-2d %s", i, strings[i]); + } + free(strings); +} +#else +void dvmPrintNativeBackTrace() { + /* Hopefully, you're on an Android device and debuggerd will do this. */ +} +#endif + +/* + * Abort the VM. We get here on fatal errors. Try very hard not to use + * this; whenever possible, return an error to somebody responsible. + */ +void dvmAbort() +{ + /* + * Leave gDvm.lastMessage on the stack frame which can be decoded in the + * tombstone file. This is for situations where we only have tombstone files + * but no logs (ie b/5372634). + * + * For example, in the tombstone file you usually see this: + * + * #00 pc 00050ef2 /system/lib/libdvm.so (dvmAbort) + * #01 pc 00077670 /system/lib/libdvm.so (_Z15dvmClassStartupv) + * : + * + * stack: + * : + * #00 beed2658 00000000 + * beed265c 7379732f + * beed2660 2f6d6574 + * beed2664 6d617266 + * beed2668 726f7765 + * beed266c 6f632f6b + * beed2670 6a2e6572 + * beed2674 00007261 + * beed2678 00000000 + * + * The ascii values between beed265c and beed2674 belongs to messageBuffer + * and it can be decoded as "/system/framework/core.jar". + */ + const int messageLength = 512; + char messageBuffer[messageLength] = {0}; + int result = 0; + + snprintf(messageBuffer, messageLength, "%s", gDvm.lastMessage); + + /* So that messageBuffer[] looks like useful stuff to the compiler */ + for (int i = 0; i < messageLength && messageBuffer[i]; i++) { + result += messageBuffer[i]; + } + + LOGE("VM aborting"); + + fflush(NULL); // flush all open file buffers + + /* JNI-supplied abort hook gets right of first refusal */ + if (gDvm.abortHook != NULL) + (*gDvm.abortHook)(); + + /* + * On the device, debuggerd will give us a stack trace. + * On the host, we have to help ourselves. + */ + dvmPrintNativeBackTrace(); + + /* + * If we call abort(), all threads in the process receives a SIBABRT. + * debuggerd dumps the stack trace of the main thread, whether or not + * that was the thread that failed. + * + * By stuffing a value into a bogus address, we cause a segmentation + * fault in the current thread, and get a useful log from debuggerd. + * We can also trivially tell the difference between a VM crash and + * a deliberate abort by looking at the fault address. + */ + *((char*)0xdeadd00d) = result; + abort(); + + /* notreached */ +} |