The Android Open Source Project | 0eec464 | 2012-04-01 00:00:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 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 | * Bit of code to wrap DEX force-updating with a fork() call. |
| 19 | */ |
| 20 | |
| 21 | #define LOG_TAG "TouchDex" |
| 22 | #include "JNIHelp.h" |
| 23 | |
| 24 | #include "cutils/properties.h" |
| 25 | |
| 26 | #include <stdlib.h> |
| 27 | #include <stdio.h> |
| 28 | #include <string.h> |
| 29 | #include <unistd.h> |
| 30 | #include <signal.h> |
| 31 | #include <sys/types.h> |
| 32 | #include <sys/wait.h> |
| 33 | #include <sys/time.h> |
| 34 | #include <assert.h> |
| 35 | #include <errno.h> |
| 36 | |
| 37 | #define JAVA_PACKAGE "dalvik/system" |
| 38 | |
| 39 | #ifndef HAVE_ANDROID_OS |
| 40 | # define BASE_DIR "/work/device/out/linux-x86-debug-sim" |
| 41 | #else |
| 42 | # define BASE_DIR "" |
| 43 | #endif |
| 44 | |
| 45 | namespace android { |
| 46 | |
| 47 | // fwd |
| 48 | static void logProcStatus(pid_t pid); |
| 49 | |
| 50 | |
| 51 | /* |
| 52 | * private static int trampoline(String dexFiles, String bcp) |
| 53 | */ |
| 54 | static jint dalvik_system_TouchDex_trampoline(JNIEnv* env, |
| 55 | jclass, jstring dexFilesStr, jstring bcpStr) |
| 56 | { |
| 57 | #ifndef HAVE_ANDROID_OS |
| 58 | /* don't do this on simulator -- gdb goes "funny" in goobuntu */ |
| 59 | return 0; |
| 60 | #endif |
| 61 | |
| 62 | const int kMinTimeout = 900; // 90 seconds |
| 63 | const char* bcp; |
| 64 | const char* dexFiles; |
| 65 | static const char* kExecFile = BASE_DIR "/system/bin/dalvikvm"; |
| 66 | //static const char* kDebugArg = |
| 67 | // "-Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n"; |
| 68 | static const char* kBcpArgName = "-Xbootclasspath:"; |
| 69 | static const char* kClassName = "dalvik.system.TouchDex"; |
| 70 | static const char* kExecMode = "-Xint"; |
| 71 | static const int argc = 7; |
| 72 | const char* argv[argc+1]; |
| 73 | const char* kVerifyArg; |
| 74 | const char* kDexOptArg; |
| 75 | int timeoutMult; |
| 76 | pid_t pid; |
| 77 | struct timeval startWhen, endWhen; |
| 78 | char propBuf[PROPERTY_VALUE_MAX]; |
| 79 | char execModeBuf[PROPERTY_VALUE_MAX + sizeof("-X")]; |
| 80 | bool verifyJava = true; |
| 81 | |
| 82 | property_get("dalvik.vm.verify-bytecode", propBuf, ""); |
| 83 | if (strcmp(propBuf, "true") == 0) { |
| 84 | verifyJava = true; |
| 85 | } else if (strcmp(propBuf, "false") == 0) { |
| 86 | verifyJava = false; |
| 87 | } else { |
| 88 | /* bad value or not defined; use default */ |
| 89 | } |
| 90 | |
| 91 | if (verifyJava) { |
| 92 | kVerifyArg = "-Xverify:all"; |
| 93 | kDexOptArg = "-Xdexopt:verified"; |
| 94 | timeoutMult = 11; |
| 95 | } else { |
| 96 | kVerifyArg = "-Xverify:none"; |
| 97 | //kDexOptArg = "-Xdexopt:all"; |
| 98 | kDexOptArg = "-Xdexopt:verified"; |
| 99 | timeoutMult = 7; |
| 100 | } |
| 101 | |
| 102 | property_get("dalvik.vm.execution-mode", propBuf, ""); |
| 103 | if (strncmp(propBuf, "int:", 4) == 0) { |
| 104 | strcpy(execModeBuf, "-X"); |
| 105 | strcat(execModeBuf, propBuf); |
| 106 | kExecMode = execModeBuf; |
| 107 | } |
| 108 | |
| 109 | LOGV("TouchDex trampoline forking\n"); |
| 110 | gettimeofday(&startWhen, NULL); |
| 111 | |
| 112 | /* |
| 113 | * Retrieve strings. Note we want to do this *before* the fork() -- bad |
| 114 | * idea to perform Java operations in the child process (not all threads |
| 115 | * get carried over to the new process). |
| 116 | */ |
| 117 | bcp = env->GetStringUTFChars(bcpStr, NULL); |
| 118 | dexFiles = env->GetStringUTFChars(dexFilesStr, NULL); |
| 119 | if (bcp == NULL || dexFiles == NULL) { |
| 120 | LOGE("Bad values for bcp=%p dexFiles=%p\n", bcp, dexFiles); |
| 121 | abort(); |
| 122 | } |
| 123 | |
| 124 | pid = fork(); |
| 125 | if (pid < 0) { |
| 126 | LOGE("fork failed: %s", strerror(errno)); |
| 127 | return -1; |
| 128 | } |
| 129 | |
| 130 | if (pid == 0) { |
| 131 | /* child */ |
| 132 | char* bcpArg; |
| 133 | |
| 134 | LOGV("TouchDex trampoline in child\n"); |
| 135 | |
| 136 | bcpArg = (char*) malloc(strlen(bcp) + strlen(kBcpArgName) +1); |
| 137 | strcpy(bcpArg, kBcpArgName); |
| 138 | strcat(bcpArg, bcp); |
| 139 | |
| 140 | argv[0] = kExecFile; |
| 141 | argv[1] = bcpArg; |
| 142 | argv[2] = kVerifyArg; |
| 143 | argv[3] = kDexOptArg; |
| 144 | argv[4] = kExecMode; |
| 145 | argv[5] = kClassName; |
| 146 | argv[6] = dexFiles; |
| 147 | argv[7] = NULL; |
| 148 | |
| 149 | //LOGI("Calling execv with args:\n"); |
| 150 | //for (int i = 0; i < argc; i++) |
| 151 | // LOGI(" %d: '%s'\n", i, argv[i]); |
| 152 | |
| 153 | execv(kExecFile, (char* const*) argv); |
| 154 | free(bcpArg); |
| 155 | |
| 156 | LOGE("execv '%s' failed: %s\n", kExecFile, strerror(errno)); |
| 157 | exit(1); |
| 158 | } else { |
| 159 | int cc, count, dexCount, timeout; |
| 160 | int result = -1; |
| 161 | const char* cp; |
| 162 | |
| 163 | /* |
| 164 | * Adjust the timeout based on how many DEX files we have to |
| 165 | * process. Larger DEX files take longer, so this is a crude |
| 166 | * approximation at best. |
| 167 | * |
| 168 | * We need this for http://b/issue?id=836771, which can leave us |
| 169 | * stuck waiting for a long time even if there is no work to be done. |
| 170 | * |
| 171 | * This is currently being (ab)used to convert single files, which |
| 172 | * sort of spoils the timeout calculation. We establish a minimum |
| 173 | * timeout for single apps. |
| 174 | * |
| 175 | * The timeout calculation doesn't work at all right when a |
| 176 | * directory is specified. So the minimum is now a minute. At |
| 177 | * this point it's probably safe to just remove the timeout. |
| 178 | * |
| 179 | * The timeout is in 1/10ths of a second. |
| 180 | */ |
| 181 | dexCount = 1; |
| 182 | cp = dexFiles; |
| 183 | while (*++cp != '\0') { |
| 184 | if (*cp == ':') |
| 185 | dexCount++; |
| 186 | } |
| 187 | timeout = timeoutMult * dexCount; |
| 188 | if (timeout < kMinTimeout) |
| 189 | timeout = kMinTimeout; |
| 190 | |
| 191 | env->ReleaseStringUTFChars(bcpStr, bcp); |
| 192 | env->ReleaseStringUTFChars(dexFilesStr, dexFiles); |
| 193 | |
| 194 | |
| 195 | LOGD("TouchDex parent waiting for pid=%d (timeout=%.1fs)\n", |
| 196 | (int) pid, timeout / 10.0); |
| 197 | for (count = 0; count < timeout; count++) { |
| 198 | /* waitpid doesn't take a timeout, so poll and sleep */ |
| 199 | cc = waitpid(pid, &result, WNOHANG); |
| 200 | if (cc < 0) { |
| 201 | LOGE("waitpid(%d) failed: %s", (int) pid, strerror(errno)); |
| 202 | return -1; |
| 203 | } else if (cc == 0) { |
| 204 | usleep(100000); /* 0.1 sec */ |
| 205 | } else { |
| 206 | /* success! */ |
| 207 | break; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | if (count == timeout) { |
| 212 | /* note kill(0) returns 0 if the pid is a zombie */ |
| 213 | LOGE("timed out waiting for %d; kill(0) returns %d\n", |
| 214 | (int) pid, kill(pid, 0)); |
| 215 | logProcStatus(pid); |
| 216 | } else { |
| 217 | LOGV("TouchDex done after %d iterations (kill(0) returns %d)\n", |
| 218 | count, kill(pid, 0)); |
| 219 | } |
| 220 | |
| 221 | gettimeofday(&endWhen, NULL); |
| 222 | long long start = startWhen.tv_sec * 1000000 + startWhen.tv_usec; |
| 223 | long long end = endWhen.tv_sec * 1000000 + endWhen.tv_usec; |
| 224 | |
| 225 | LOGI("Dalvik-cache prep: status=0x%04x, finished in %dms\n", |
| 226 | result, (int) ((end - start) / 1000)); |
| 227 | |
| 228 | if (WIFEXITED(result)) |
| 229 | return WEXITSTATUS(result); |
| 230 | else |
| 231 | return result; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * Dump the contents of /proc/<pid>/status to the log file. |
| 237 | */ |
| 238 | static void logProcStatus(pid_t pid) |
| 239 | { |
| 240 | char localBuf[256]; |
| 241 | FILE* fp; |
| 242 | |
| 243 | sprintf(localBuf, "/proc/%d/status", (int) pid); |
| 244 | fp = fopen(localBuf, "r"); |
| 245 | if (fp == NULL) { |
| 246 | LOGI("Unable to open '%s'\n", localBuf); |
| 247 | return; |
| 248 | } |
| 249 | |
| 250 | LOGI("Contents of %s:\n", localBuf); |
| 251 | while (true) { |
| 252 | fgets(localBuf, sizeof(localBuf), fp); |
| 253 | if (ferror(fp) || feof(fp)) |
| 254 | break; |
| 255 | LOGI(" %s", localBuf); |
| 256 | } |
| 257 | |
| 258 | fclose(fp); |
| 259 | } |
| 260 | |
| 261 | static JNINativeMethod gMethods[] = { |
| 262 | { "trampoline", "(Ljava/lang/String;Ljava/lang/String;)I", |
| 263 | (void*) dalvik_system_TouchDex_trampoline }, |
| 264 | }; |
| 265 | int register_dalvik_system_TouchDex(JNIEnv* env) { |
| 266 | return jniRegisterNativeMethods(env, JAVA_PACKAGE "/TouchDex", gMethods, NELEM(gMethods)); |
| 267 | } |
| 268 | |
| 269 | }; // namespace android |