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 #define LOG_TAG "android.os.Debug" 18 #include "JNIHelp.h" 19 #include "jni.h" 20 #include <utils/String8.h> 21 #include "utils/misc.h" 22 #include "cutils/debugger.h" 23 #include <memtrack/memtrack.h> 24 25 #include <cutils/log.h> 26 #include <fcntl.h> 27 #include <inttypes.h> 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <string.h> 31 #include <unistd.h> 32 #include <time.h> 33 #include <sys/time.h> 34 #include <errno.h> 35 #include <assert.h> 36 #include <ctype.h> 37 38 #ifdef HAVE_MALLOC_H 39 #include <malloc.h> 40 #endif 41 42 namespace android 43 { 44 45 enum { 46 HEAP_UNKNOWN, 47 HEAP_DALVIK, 48 HEAP_NATIVE, 49 HEAP_DALVIK_OTHER, 50 HEAP_STACK, 51 HEAP_CURSOR, 52 HEAP_ASHMEM, 53 HEAP_UNKNOWN_DEV, 54 HEAP_SO, 55 HEAP_JAR, 56 HEAP_APK, 57 HEAP_TTF, 58 HEAP_DEX, 59 HEAP_OAT, 60 HEAP_ART, 61 HEAP_UNKNOWN_MAP, 62 HEAP_GRAPHICS, 63 HEAP_GL, 64 HEAP_OTHER_MEMTRACK, 65 66 HEAP_DALVIK_NORMAL, 67 HEAP_DALVIK_LARGE, 68 HEAP_DALVIK_LINEARALLOC, 69 HEAP_DALVIK_ACCOUNTING, 70 HEAP_DALVIK_CODE_CACHE, 71 72 _NUM_HEAP, 73 _NUM_EXCLUSIVE_HEAP = HEAP_OTHER_MEMTRACK+1, 74 _NUM_CORE_HEAP = HEAP_NATIVE+1 75 }; 76 77 struct stat_fields { 78 jfieldID pss_field; 79 jfieldID pssSwappable_field; 80 jfieldID privateDirty_field; 81 jfieldID sharedDirty_field; 82 jfieldID privateClean_field; 83 jfieldID sharedClean_field; 84 jfieldID swappedOut_field; 85 }; 86 87 struct stat_field_names { 88 const char* pss_name; 89 const char* pssSwappable_name; 90 const char* privateDirty_name; 91 const char* sharedDirty_name; 92 const char* privateClean_name; 93 const char* sharedClean_name; 94 const char* swappedOut_name; 95 }; 96 97 static stat_fields stat_fields[_NUM_CORE_HEAP]; 98 99 static stat_field_names stat_field_names[_NUM_CORE_HEAP] = { 100 { "otherPss", "otherSwappablePss", "otherPrivateDirty", "otherSharedDirty", 101 "otherPrivateClean", "otherSharedClean", "otherSwappedOut" }, 102 { "dalvikPss", "dalvikSwappablePss", "dalvikPrivateDirty", "dalvikSharedDirty", 103 "dalvikPrivateClean", "dalvikSharedClean", "dalvikSwappedOut" }, 104 { "nativePss", "nativeSwappablePss", "nativePrivateDirty", "nativeSharedDirty", 105 "nativePrivateClean", "nativeSharedClean", "nativeSwappedOut" } 106 }; 107 108 jfieldID otherStats_field; 109 110 static bool memtrackLoaded; 111 112 struct stats_t { 113 int pss; 114 int swappablePss; 115 int privateDirty; 116 int sharedDirty; 117 int privateClean; 118 int sharedClean; 119 int swappedOut; 120 }; 121 122 #define BINDER_STATS "/proc/binder/stats" 123 124 static jlong android_os_Debug_getNativeHeapSize(JNIEnv *env, jobject clazz) 125 { 126 #ifdef HAVE_MALLOC_H 127 struct mallinfo info = mallinfo(); 128 return (jlong) info.usmblks; 129 #else 130 return -1; 131 #endif 132 } 133 134 static jlong android_os_Debug_getNativeHeapAllocatedSize(JNIEnv *env, jobject clazz) 135 { 136 #ifdef HAVE_MALLOC_H 137 struct mallinfo info = mallinfo(); 138 return (jlong) info.uordblks; 139 #else 140 return -1; 141 #endif 142 } 143 144 static jlong android_os_Debug_getNativeHeapFreeSize(JNIEnv *env, jobject clazz) 145 { 146 #ifdef HAVE_MALLOC_H 147 struct mallinfo info = mallinfo(); 148 return (jlong) info.fordblks; 149 #else 150 return -1; 151 #endif 152 } 153 154 // Container used to retrieve graphics memory pss 155 struct graphics_memory_pss 156 { 157 int graphics; 158 int gl; 159 int other; 160 }; 161 162 /* 163 * Uses libmemtrack to retrieve graphics memory that the process is using. 164 * Any graphics memory reported in /proc/pid/smaps is not included here. 165 */ 166 static int read_memtrack_memory(struct memtrack_proc* p, int pid, 167 struct graphics_memory_pss* graphics_mem) 168 { 169 int err = memtrack_proc_get(p, pid); 170 if (err != 0) { 171 ALOGW("failed to get memory consumption info: %d", err); 172 return err; 173 } 174 175 ssize_t pss = memtrack_proc_graphics_pss(p); 176 if (pss < 0) { 177 ALOGW("failed to get graphics pss: %zd", pss); 178 return pss; 179 } 180 graphics_mem->graphics = pss / 1024; 181 182 pss = memtrack_proc_gl_pss(p); 183 if (pss < 0) { 184 ALOGW("failed to get gl pss: %zd", pss); 185 return pss; 186 } 187 graphics_mem->gl = pss / 1024; 188 189 pss = memtrack_proc_other_pss(p); 190 if (pss < 0) { 191 ALOGW("failed to get other pss: %zd", pss); 192 return pss; 193 } 194 graphics_mem->other = pss / 1024; 195 196 return 0; 197 } 198 199 /* 200 * Retrieves the graphics memory that is unaccounted for in /proc/pid/smaps. 201 */ 202 static int read_memtrack_memory(int pid, struct graphics_memory_pss* graphics_mem) 203 { 204 if (!memtrackLoaded) { 205 return -1; 206 } 207 208 struct memtrack_proc* p = memtrack_proc_new(); 209 if (p == NULL) { 210 ALOGW("failed to create memtrack_proc"); 211 return -1; 212 } 213 214 int err = read_memtrack_memory(p, pid, graphics_mem); 215 memtrack_proc_destroy(p); 216 return err; 217 } 218 219 static void read_mapinfo(FILE *fp, stats_t* stats) 220 { 221 char line[1024]; 222 int len, nameLen; 223 bool skip, done = false; 224 225 unsigned size = 0, resident = 0, pss = 0, swappable_pss = 0; 226 float sharing_proportion = 0.0; 227 unsigned shared_clean = 0, shared_dirty = 0; 228 unsigned private_clean = 0, private_dirty = 0; 229 unsigned swapped_out = 0; 230 bool is_swappable = false; 231 unsigned referenced = 0; 232 unsigned temp; 233 234 uint64_t start; 235 uint64_t end = 0; 236 uint64_t prevEnd = 0; 237 char* name; 238 int name_pos; 239 240 int whichHeap = HEAP_UNKNOWN; 241 int subHeap = HEAP_UNKNOWN; 242 int prevHeap = HEAP_UNKNOWN; 243 244 if(fgets(line, sizeof(line), fp) == 0) return; 245 246 while (!done) { 247 prevHeap = whichHeap; 248 prevEnd = end; 249 whichHeap = HEAP_UNKNOWN; 250 subHeap = HEAP_UNKNOWN; 251 skip = false; 252 is_swappable = false; 253 254 len = strlen(line); 255 if (len < 1) return; 256 line[--len] = 0; 257 258 if (sscanf(line, "%" SCNx64 "-%" SCNx64 " %*s %*x %*x:%*x %*d%n", &start, &end, &name_pos) != 2) { 259 skip = true; 260 } else { 261 while (isspace(line[name_pos])) { 262 name_pos += 1; 263 } 264 name = line + name_pos; 265 nameLen = strlen(name); 266 267 if ((strstr(name, "[heap]") == name)) { 268 whichHeap = HEAP_NATIVE; 269 } else if (strncmp(name, "/dev/ashmem", 11) == 0) { 270 if (strncmp(name, "/dev/ashmem/dalvik-", 19) == 0) { 271 whichHeap = HEAP_DALVIK_OTHER; 272 if (strstr(name, "/dev/ashmem/dalvik-LinearAlloc") == name) { 273 subHeap = HEAP_DALVIK_LINEARALLOC; 274 } else if ((strstr(name, "/dev/ashmem/dalvik-alloc space") == name) || 275 (strstr(name, "/dev/ashmem/dalvik-main space") == name) || 276 (strstr(name, "/dev/ashmem/dalvik-non moving space") == name)) { 277 // This is the regular Dalvik heap. 278 whichHeap = HEAP_DALVIK; 279 subHeap = HEAP_DALVIK_NORMAL; 280 } else if (strstr(name, "/dev/ashmem/dalvik-large object space") == name) { 281 whichHeap = HEAP_DALVIK; 282 subHeap = HEAP_DALVIK_LARGE; 283 } else if (strstr(name, "/dev/ashmem/dalvik-jit-code-cache") == name) { 284 subHeap = HEAP_DALVIK_CODE_CACHE; 285 } else { 286 subHeap = HEAP_DALVIK_ACCOUNTING; // Default to accounting. 287 } 288 } else if (strncmp(name, "/dev/ashmem/CursorWindow", 24) == 0) { 289 whichHeap = HEAP_CURSOR; 290 } else if (strncmp(name, "/dev/ashmem/libc malloc", 23) == 0) { 291 whichHeap = HEAP_NATIVE; 292 } else { 293 whichHeap = HEAP_ASHMEM; 294 } 295 } else if (strncmp(name, "[anon:libc_malloc]", 18) == 0) { 296 whichHeap = HEAP_NATIVE; 297 } else if (strncmp(name, "[stack", 6) == 0) { 298 whichHeap = HEAP_STACK; 299 } else if (strncmp(name, "/dev/", 5) == 0) { 300 whichHeap = HEAP_UNKNOWN_DEV; 301 } else if (nameLen > 3 && strcmp(name+nameLen-3, ".so") == 0) { 302 whichHeap = HEAP_SO; 303 is_swappable = true; 304 } else if (nameLen > 4 && strcmp(name+nameLen-4, ".jar") == 0) { 305 whichHeap = HEAP_JAR; 306 is_swappable = true; 307 } else if (nameLen > 4 && strcmp(name+nameLen-4, ".apk") == 0) { 308 whichHeap = HEAP_APK; 309 is_swappable = true; 310 } else if (nameLen > 4 && strcmp(name+nameLen-4, ".ttf") == 0) { 311 whichHeap = HEAP_TTF; 312 is_swappable = true; 313 } else if ((nameLen > 4 && strcmp(name+nameLen-4, ".dex") == 0) || 314 (nameLen > 5 && strcmp(name+nameLen-5, ".odex") == 0)) { 315 whichHeap = HEAP_DEX; 316 is_swappable = true; 317 } else if (nameLen > 4 && strcmp(name+nameLen-4, ".oat") == 0) { 318 whichHeap = HEAP_OAT; 319 is_swappable = true; 320 } else if (nameLen > 4 && strcmp(name+nameLen-4, ".art") == 0) { 321 whichHeap = HEAP_ART; 322 is_swappable = true; 323 } else if (strncmp(name, "[anon:", 6) == 0) { 324 whichHeap = HEAP_UNKNOWN; 325 } else if (nameLen > 0) { 326 whichHeap = HEAP_UNKNOWN_MAP; 327 } else if (start == prevEnd && prevHeap == HEAP_SO) { 328 // bss section of a shared library. 329 whichHeap = HEAP_SO; 330 } 331 } 332 333 //ALOGI("native=%d dalvik=%d sqlite=%d: %s\n", isNativeHeap, isDalvikHeap, 334 // isSqliteHeap, line); 335 336 shared_clean = 0; 337 shared_dirty = 0; 338 private_clean = 0; 339 private_dirty = 0; 340 swapped_out = 0; 341 342 while (true) { 343 if (fgets(line, 1024, fp) == 0) { 344 done = true; 345 break; 346 } 347 348 if (line[0] == 'S' && sscanf(line, "Size: %d kB", &temp) == 1) { 349 size = temp; 350 } else if (line[0] == 'R' && sscanf(line, "Rss: %d kB", &temp) == 1) { 351 resident = temp; 352 } else if (line[0] == 'P' && sscanf(line, "Pss: %d kB", &temp) == 1) { 353 pss = temp; 354 } else if (line[0] == 'S' && sscanf(line, "Shared_Clean: %d kB", &temp) == 1) { 355 shared_clean = temp; 356 } else if (line[0] == 'S' && sscanf(line, "Shared_Dirty: %d kB", &temp) == 1) { 357 shared_dirty = temp; 358 } else if (line[0] == 'P' && sscanf(line, "Private_Clean: %d kB", &temp) == 1) { 359 private_clean = temp; 360 } else if (line[0] == 'P' && sscanf(line, "Private_Dirty: %d kB", &temp) == 1) { 361 private_dirty = temp; 362 } else if (line[0] == 'R' && sscanf(line, "Referenced: %d kB", &temp) == 1) { 363 referenced = temp; 364 } else if (line[0] == 'S' && sscanf(line, "Swap: %d kB", &temp) == 1) { 365 swapped_out = temp; 366 } else if (sscanf(line, "%" SCNx64 "-%" SCNx64 " %*s %*x %*x:%*x %*d", &start, &end) == 2) { 367 // looks like a new mapping 368 // example: "10000000-10001000 ---p 10000000 00:00 0" 369 break; 370 } 371 } 372 373 if (!skip) { 374 if (is_swappable && (pss > 0)) { 375 sharing_proportion = 0.0; 376 if ((shared_clean > 0) || (shared_dirty > 0)) { 377 sharing_proportion = (pss - private_clean 378 - private_dirty)/(shared_clean+shared_dirty); 379 } 380 swappable_pss = (sharing_proportion*shared_clean) + private_clean; 381 } else 382 swappable_pss = 0; 383 384 stats[whichHeap].pss += pss; 385 stats[whichHeap].swappablePss += swappable_pss; 386 stats[whichHeap].privateDirty += private_dirty; 387 stats[whichHeap].sharedDirty += shared_dirty; 388 stats[whichHeap].privateClean += private_clean; 389 stats[whichHeap].sharedClean += shared_clean; 390 stats[whichHeap].swappedOut += swapped_out; 391 if (whichHeap == HEAP_DALVIK || whichHeap == HEAP_DALVIK_OTHER) { 392 stats[subHeap].pss += pss; 393 stats[subHeap].swappablePss += swappable_pss; 394 stats[subHeap].privateDirty += private_dirty; 395 stats[subHeap].sharedDirty += shared_dirty; 396 stats[subHeap].privateClean += private_clean; 397 stats[subHeap].sharedClean += shared_clean; 398 stats[subHeap].swappedOut += swapped_out; 399 } 400 } 401 } 402 } 403 404 static void load_maps(int pid, stats_t* stats) 405 { 406 char tmp[128]; 407 FILE *fp; 408 409 sprintf(tmp, "/proc/%d/smaps", pid); 410 fp = fopen(tmp, "r"); 411 if (fp == 0) return; 412 413 read_mapinfo(fp, stats); 414 fclose(fp); 415 } 416 417 static void android_os_Debug_getDirtyPagesPid(JNIEnv *env, jobject clazz, 418 jint pid, jobject object) 419 { 420 stats_t stats[_NUM_HEAP]; 421 memset(&stats, 0, sizeof(stats)); 422 423 load_maps(pid, stats); 424 425 struct graphics_memory_pss graphics_mem; 426 if (read_memtrack_memory(pid, &graphics_mem) == 0) { 427 stats[HEAP_GRAPHICS].pss = graphics_mem.graphics; 428 stats[HEAP_GRAPHICS].privateDirty = graphics_mem.graphics; 429 stats[HEAP_GL].pss = graphics_mem.gl; 430 stats[HEAP_GL].privateDirty = graphics_mem.gl; 431 stats[HEAP_OTHER_MEMTRACK].pss = graphics_mem.other; 432 stats[HEAP_OTHER_MEMTRACK].privateDirty = graphics_mem.other; 433 } 434 435 for (int i=_NUM_CORE_HEAP; i<_NUM_EXCLUSIVE_HEAP; i++) { 436 stats[HEAP_UNKNOWN].pss += stats[i].pss; 437 stats[HEAP_UNKNOWN].swappablePss += stats[i].swappablePss; 438 stats[HEAP_UNKNOWN].privateDirty += stats[i].privateDirty; 439 stats[HEAP_UNKNOWN].sharedDirty += stats[i].sharedDirty; 440 stats[HEAP_UNKNOWN].privateClean += stats[i].privateClean; 441 stats[HEAP_UNKNOWN].sharedClean += stats[i].sharedClean; 442 stats[HEAP_UNKNOWN].swappedOut += stats[i].swappedOut; 443 } 444 445 for (int i=0; i<_NUM_CORE_HEAP; i++) { 446 env->SetIntField(object, stat_fields[i].pss_field, stats[i].pss); 447 env->SetIntField(object, stat_fields[i].pssSwappable_field, stats[i].swappablePss); 448 env->SetIntField(object, stat_fields[i].privateDirty_field, stats[i].privateDirty); 449 env->SetIntField(object, stat_fields[i].sharedDirty_field, stats[i].sharedDirty); 450 env->SetIntField(object, stat_fields[i].privateClean_field, stats[i].privateClean); 451 env->SetIntField(object, stat_fields[i].sharedClean_field, stats[i].sharedClean); 452 env->SetIntField(object, stat_fields[i].swappedOut_field, stats[i].swappedOut); 453 } 454 455 456 jintArray otherIntArray = (jintArray)env->GetObjectField(object, otherStats_field); 457 458 jint* otherArray = (jint*)env->GetPrimitiveArrayCritical(otherIntArray, 0); 459 if (otherArray == NULL) { 460 return; 461 } 462 463 int j=0; 464 for (int i=_NUM_CORE_HEAP; i<_NUM_HEAP; i++) { 465 otherArray[j++] = stats[i].pss; 466 otherArray[j++] = stats[i].swappablePss; 467 otherArray[j++] = stats[i].privateDirty; 468 otherArray[j++] = stats[i].sharedDirty; 469 otherArray[j++] = stats[i].privateClean; 470 otherArray[j++] = stats[i].sharedClean; 471 otherArray[j++] = stats[i].swappedOut; 472 } 473 474 env->ReleasePrimitiveArrayCritical(otherIntArray, otherArray, 0); 475 } 476 477 static void android_os_Debug_getDirtyPages(JNIEnv *env, jobject clazz, jobject object) 478 { 479 android_os_Debug_getDirtyPagesPid(env, clazz, getpid(), object); 480 } 481 482 static jlong android_os_Debug_getPssPid(JNIEnv *env, jobject clazz, jint pid, jlongArray outUss) 483 { 484 char line[1024]; 485 jlong pss = 0; 486 jlong uss = 0; 487 unsigned temp; 488 489 char tmp[128]; 490 FILE *fp; 491 492 struct graphics_memory_pss graphics_mem; 493 if (read_memtrack_memory(pid, &graphics_mem) == 0) { 494 pss = uss = graphics_mem.graphics + graphics_mem.gl + graphics_mem.other; 495 } 496 497 sprintf(tmp, "/proc/%d/smaps", pid); 498 fp = fopen(tmp, "r"); 499 500 if (fp != 0) { 501 while (true) { 502 if (fgets(line, 1024, fp) == NULL) { 503 break; 504 } 505 506 if (line[0] == 'P') { 507 if (strncmp(line, "Pss:", 4) == 0) { 508 char* c = line + 4; 509 while (*c != 0 && (*c < '0' || *c > '9')) { 510 c++; 511 } 512 pss += atoi(c); 513 } else if (strncmp(line, "Private_Clean:", 14) 514 || strncmp(line, "Private_Dirty:", 14)) { 515 char* c = line + 14; 516 while (*c != 0 && (*c < '0' || *c > '9')) { 517 c++; 518 } 519 uss += atoi(c); 520 } 521 } 522 } 523 524 fclose(fp); 525 } 526 527 if (outUss != NULL) { 528 if (env->GetArrayLength(outUss) >= 1) { 529 jlong* outUssArray = env->GetLongArrayElements(outUss, 0); 530 if (outUssArray != NULL) { 531 outUssArray[0] = uss; 532 } 533 env->ReleaseLongArrayElements(outUss, outUssArray, 0); 534 } 535 } 536 537 return pss; 538 } 539 540 static jlong android_os_Debug_getPss(JNIEnv *env, jobject clazz) 541 { 542 return android_os_Debug_getPssPid(env, clazz, getpid(), NULL); 543 } 544 545 enum { 546 MEMINFO_TOTAL, 547 MEMINFO_FREE, 548 MEMINFO_BUFFERS, 549 MEMINFO_CACHED, 550 MEMINFO_SHMEM, 551 MEMINFO_SLAB, 552 MEMINFO_SWAP_TOTAL, 553 MEMINFO_SWAP_FREE, 554 MEMINFO_ZRAM_TOTAL, 555 MEMINFO_COUNT 556 }; 557 558 static void android_os_Debug_getMemInfo(JNIEnv *env, jobject clazz, jlongArray out) 559 { 560 char buffer[1024]; 561 int numFound = 0; 562 563 if (out == NULL) { 564 jniThrowNullPointerException(env, "out == null"); 565 return; 566 } 567 568 int fd = open("/proc/meminfo", O_RDONLY); 569 570 if (fd < 0) { 571 ALOGW("Unable to open /proc/meminfo: %s\n", strerror(errno)); 572 return; 573 } 574 575 int len = read(fd, buffer, sizeof(buffer)-1); 576 close(fd); 577 578 if (len < 0) { 579 ALOGW("Empty /proc/meminfo"); 580 return; 581 } 582 buffer[len] = 0; 583 584 static const char* const tags[] = { 585 "MemTotal:", 586 "MemFree:", 587 "Buffers:", 588 "Cached:", 589 "Shmem:", 590 "Slab:", 591 "SwapTotal:", 592 "SwapFree:", 593 NULL 594 }; 595 static const int tagsLen[] = { 596 9, 597 8, 598 8, 599 7, 600 6, 601 5, 602 10, 603 9, 604 0 605 }; 606 long mem[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 }; 607 608 char* p = buffer; 609 while (*p && numFound < 8) { 610 int i = 0; 611 while (tags[i]) { 612 if (strncmp(p, tags[i], tagsLen[i]) == 0) { 613 p += tagsLen[i]; 614 while (*p == ' ') p++; 615 char* num = p; 616 while (*p >= '0' && *p <= '9') p++; 617 if (*p != 0) { 618 *p = 0; 619 p++; 620 } 621 mem[i] = atoll(num); 622 numFound++; 623 break; 624 } 625 i++; 626 } 627 while (*p && *p != '\n') { 628 p++; 629 } 630 if (*p) p++; 631 } 632 633 fd = open("/sys/block/zram0/mem_used_total", O_RDONLY); 634 if (fd >= 0) { 635 len = read(fd, buffer, sizeof(buffer)-1); 636 close(fd); 637 if (len > 0) { 638 buffer[len] = 0; 639 mem[MEMINFO_ZRAM_TOTAL] = atoll(buffer)/1024; 640 } 641 } 642 643 int maxNum = env->GetArrayLength(out); 644 if (maxNum > MEMINFO_COUNT) { 645 maxNum = MEMINFO_COUNT; 646 } 647 jlong* outArray = env->GetLongArrayElements(out, 0); 648 if (outArray != NULL) { 649 for (int i=0; i<maxNum; i++) { 650 outArray[i] = mem[i]; 651 } 652 } 653 env->ReleaseLongArrayElements(out, outArray, 0); 654 } 655 656 static jint read_binder_stat(const char* stat) 657 { 658 FILE* fp = fopen(BINDER_STATS, "r"); 659 if (fp == NULL) { 660 return -1; 661 } 662 663 char line[1024]; 664 665 char compare[128]; 666 int len = snprintf(compare, 128, "proc %d", getpid()); 667 668 // loop until we have the block that represents this process 669 do { 670 if (fgets(line, 1024, fp) == 0) { 671 fclose(fp); 672 return -1; 673 } 674 } while (strncmp(compare, line, len)); 675 676 // now that we have this process, read until we find the stat that we are looking for 677 len = snprintf(compare, 128, " %s: ", stat); 678 679 do { 680 if (fgets(line, 1024, fp) == 0) { 681 fclose(fp); 682 return -1; 683 } 684 } while (strncmp(compare, line, len)); 685 686 // we have the line, now increment the line ptr to the value 687 char* ptr = line + len; 688 jint result = atoi(ptr); 689 fclose(fp); 690 return result; 691 } 692 693 static jint android_os_Debug_getBinderSentTransactions(JNIEnv *env, jobject clazz) 694 { 695 return read_binder_stat("bcTRANSACTION"); 696 } 697 698 static jint android_os_getBinderReceivedTransactions(JNIEnv *env, jobject clazz) 699 { 700 return read_binder_stat("brTRANSACTION"); 701 } 702 703 // these are implemented in android_util_Binder.cpp 704 jint android_os_Debug_getLocalObjectCount(JNIEnv* env, jobject clazz); 705 jint android_os_Debug_getProxyObjectCount(JNIEnv* env, jobject clazz); 706 jint android_os_Debug_getDeathObjectCount(JNIEnv* env, jobject clazz); 707 708 709 /* pulled out of bionic */ 710 extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize, 711 size_t* infoSize, size_t* totalMemory, size_t* backtraceSize); 712 extern "C" void free_malloc_leak_info(uint8_t* info); 713 #define SIZE_FLAG_ZYGOTE_CHILD (1<<31) 714 #define BACKTRACE_SIZE 32 715 716 /* 717 * This is a qsort() callback. 718 * 719 * See dumpNativeHeap() for comments about the data format and sort order. 720 */ 721 static int compareHeapRecords(const void* vrec1, const void* vrec2) 722 { 723 const size_t* rec1 = (const size_t*) vrec1; 724 const size_t* rec2 = (const size_t*) vrec2; 725 size_t size1 = *rec1; 726 size_t size2 = *rec2; 727 728 if (size1 < size2) { 729 return 1; 730 } else if (size1 > size2) { 731 return -1; 732 } 733 734 intptr_t* bt1 = (intptr_t*)(rec1 + 2); 735 intptr_t* bt2 = (intptr_t*)(rec2 + 2); 736 for (size_t idx = 0; idx < BACKTRACE_SIZE; idx++) { 737 intptr_t addr1 = bt1[idx]; 738 intptr_t addr2 = bt2[idx]; 739 if (addr1 == addr2) { 740 if (addr1 == 0) 741 break; 742 continue; 743 } 744 if (addr1 < addr2) { 745 return -1; 746 } else if (addr1 > addr2) { 747 return 1; 748 } 749 } 750 751 return 0; 752 } 753 754 /* 755 * The get_malloc_leak_info() call returns an array of structs that 756 * look like this: 757 * 758 * size_t size 759 * size_t allocations 760 * intptr_t backtrace[32] 761 * 762 * "size" is the size of the allocation, "backtrace" is a fixed-size 763 * array of function pointers, and "allocations" is the number of 764 * allocations with the exact same size and backtrace. 765 * 766 * The entries are sorted by descending total size (i.e. size*allocations) 767 * then allocation count. For best results with "diff" we'd like to sort 768 * primarily by individual size then stack trace. Since the entries are 769 * fixed-size, and we're allowed (by the current implementation) to mangle 770 * them, we can do this in place. 771 */ 772 static void dumpNativeHeap(FILE* fp) 773 { 774 uint8_t* info = NULL; 775 size_t overallSize, infoSize, totalMemory, backtraceSize; 776 777 get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, 778 &backtraceSize); 779 if (info == NULL) { 780 fprintf(fp, "Native heap dump not available. To enable, run these" 781 " commands (requires root):\n"); 782 fprintf(fp, "$ adb shell setprop libc.debug.malloc 1\n"); 783 fprintf(fp, "$ adb shell stop\n"); 784 fprintf(fp, "$ adb shell start\n"); 785 return; 786 } 787 assert(infoSize != 0); 788 assert(overallSize % infoSize == 0); 789 790 fprintf(fp, "Android Native Heap Dump v1.0\n\n"); 791 792 size_t recordCount = overallSize / infoSize; 793 fprintf(fp, "Total memory: %zu\n", totalMemory); 794 fprintf(fp, "Allocation records: %zd\n", recordCount); 795 if (backtraceSize != BACKTRACE_SIZE) { 796 fprintf(fp, "WARNING: mismatched backtrace sizes (%zu vs. %d)\n", 797 backtraceSize, BACKTRACE_SIZE); 798 } 799 fprintf(fp, "\n"); 800 801 /* re-sort the entries */ 802 qsort(info, recordCount, infoSize, compareHeapRecords); 803 804 /* dump the entries to the file */ 805 const uint8_t* ptr = info; 806 for (size_t idx = 0; idx < recordCount; idx++) { 807 size_t size = *(size_t*) ptr; 808 size_t allocations = *(size_t*) (ptr + sizeof(size_t)); 809 intptr_t* backtrace = (intptr_t*) (ptr + sizeof(size_t) * 2); 810 811 fprintf(fp, "z %d sz %8zu num %4zu bt", 812 (size & SIZE_FLAG_ZYGOTE_CHILD) != 0, 813 size & ~SIZE_FLAG_ZYGOTE_CHILD, 814 allocations); 815 for (size_t bt = 0; bt < backtraceSize; bt++) { 816 if (backtrace[bt] == 0) { 817 break; 818 } else { 819 #ifdef __LP64__ 820 fprintf(fp, " %016" PRIxPTR, backtrace[bt]); 821 #else 822 fprintf(fp, " %08" PRIxPTR, backtrace[bt]); 823 #endif 824 } 825 } 826 fprintf(fp, "\n"); 827 828 ptr += infoSize; 829 } 830 831 free_malloc_leak_info(info); 832 833 fprintf(fp, "MAPS\n"); 834 const char* maps = "/proc/self/maps"; 835 FILE* in = fopen(maps, "r"); 836 if (in == NULL) { 837 fprintf(fp, "Could not open %s\n", maps); 838 return; 839 } 840 char buf[BUFSIZ]; 841 while (size_t n = fread(buf, sizeof(char), BUFSIZ, in)) { 842 fwrite(buf, sizeof(char), n, fp); 843 } 844 fclose(in); 845 846 fprintf(fp, "END\n"); 847 } 848 849 /* 850 * Dump the native heap, writing human-readable output to the specified 851 * file descriptor. 852 */ 853 static void android_os_Debug_dumpNativeHeap(JNIEnv* env, jobject clazz, 854 jobject fileDescriptor) 855 { 856 if (fileDescriptor == NULL) { 857 jniThrowNullPointerException(env, "fd == null"); 858 return; 859 } 860 int origFd = jniGetFDFromFileDescriptor(env, fileDescriptor); 861 if (origFd < 0) { 862 jniThrowRuntimeException(env, "Invalid file descriptor"); 863 return; 864 } 865 866 /* dup() the descriptor so we don't close the original with fclose() */ 867 int fd = dup(origFd); 868 if (fd < 0) { 869 ALOGW("dup(%d) failed: %s\n", origFd, strerror(errno)); 870 jniThrowRuntimeException(env, "dup() failed"); 871 return; 872 } 873 874 FILE* fp = fdopen(fd, "w"); 875 if (fp == NULL) { 876 ALOGW("fdopen(%d) failed: %s\n", fd, strerror(errno)); 877 close(fd); 878 jniThrowRuntimeException(env, "fdopen() failed"); 879 return; 880 } 881 882 ALOGD("Native heap dump starting...\n"); 883 dumpNativeHeap(fp); 884 ALOGD("Native heap dump complete.\n"); 885 886 fclose(fp); 887 } 888 889 890 static void android_os_Debug_dumpNativeBacktraceToFile(JNIEnv* env, jobject clazz, 891 jint pid, jstring fileName) 892 { 893 if (fileName == NULL) { 894 jniThrowNullPointerException(env, "file == null"); 895 return; 896 } 897 const jchar* str = env->GetStringCritical(fileName, 0); 898 String8 fileName8; 899 if (str) { 900 fileName8 = String8(str, env->GetStringLength(fileName)); 901 env->ReleaseStringCritical(fileName, str); 902 } 903 904 int fd = open(fileName8.string(), O_CREAT | O_WRONLY | O_NOFOLLOW, 0666); /* -rw-rw-rw- */ 905 if (fd < 0) { 906 fprintf(stderr, "Can't open %s: %s\n", fileName8.string(), strerror(errno)); 907 return; 908 } 909 910 if (lseek(fd, 0, SEEK_END) < 0) { 911 fprintf(stderr, "lseek: %s\n", strerror(errno)); 912 } else { 913 dump_backtrace_to_file(pid, fd); 914 } 915 916 close(fd); 917 } 918 919 /* 920 * JNI registration. 921 */ 922 923 static JNINativeMethod gMethods[] = { 924 { "getNativeHeapSize", "()J", 925 (void*) android_os_Debug_getNativeHeapSize }, 926 { "getNativeHeapAllocatedSize", "()J", 927 (void*) android_os_Debug_getNativeHeapAllocatedSize }, 928 { "getNativeHeapFreeSize", "()J", 929 (void*) android_os_Debug_getNativeHeapFreeSize }, 930 { "getMemoryInfo", "(Landroid/os/Debug$MemoryInfo;)V", 931 (void*) android_os_Debug_getDirtyPages }, 932 { "getMemoryInfo", "(ILandroid/os/Debug$MemoryInfo;)V", 933 (void*) android_os_Debug_getDirtyPagesPid }, 934 { "getPss", "()J", 935 (void*) android_os_Debug_getPss }, 936 { "getPss", "(I[J)J", 937 (void*) android_os_Debug_getPssPid }, 938 { "getMemInfo", "([J)V", 939 (void*) android_os_Debug_getMemInfo }, 940 { "dumpNativeHeap", "(Ljava/io/FileDescriptor;)V", 941 (void*) android_os_Debug_dumpNativeHeap }, 942 { "getBinderSentTransactions", "()I", 943 (void*) android_os_Debug_getBinderSentTransactions }, 944 { "getBinderReceivedTransactions", "()I", 945 (void*) android_os_getBinderReceivedTransactions }, 946 { "getBinderLocalObjectCount", "()I", 947 (void*)android_os_Debug_getLocalObjectCount }, 948 { "getBinderProxyObjectCount", "()I", 949 (void*)android_os_Debug_getProxyObjectCount }, 950 { "getBinderDeathObjectCount", "()I", 951 (void*)android_os_Debug_getDeathObjectCount }, 952 { "dumpNativeBacktraceToFile", "(ILjava/lang/String;)V", 953 (void*)android_os_Debug_dumpNativeBacktraceToFile }, 954 }; 955 956 int register_android_os_Debug(JNIEnv *env) 957 { 958 int err = memtrack_init(); 959 if (err != 0) { 960 memtrackLoaded = false; 961 ALOGE("failed to load memtrack module: %d", err); 962 } else { 963 memtrackLoaded = true; 964 } 965 966 jclass clazz = env->FindClass("android/os/Debug$MemoryInfo"); 967 968 // Sanity check the number of other statistics expected in Java matches here. 969 jfieldID numOtherStats_field = env->GetStaticFieldID(clazz, "NUM_OTHER_STATS", "I"); 970 jint numOtherStats = env->GetStaticIntField(clazz, numOtherStats_field); 971 jfieldID numDvkStats_field = env->GetStaticFieldID(clazz, "NUM_DVK_STATS", "I"); 972 jint numDvkStats = env->GetStaticIntField(clazz, numDvkStats_field); 973 int expectedNumOtherStats = _NUM_HEAP - _NUM_CORE_HEAP; 974 if ((numOtherStats + numDvkStats) != expectedNumOtherStats) { 975 jniThrowExceptionFmt(env, "java/lang/RuntimeException", 976 "android.os.Debug.Meminfo.NUM_OTHER_STATS+android.os.Debug.Meminfo.NUM_DVK_STATS=%d expected %d", 977 numOtherStats+numDvkStats, expectedNumOtherStats); 978 return JNI_ERR; 979 } 980 981 otherStats_field = env->GetFieldID(clazz, "otherStats", "[I"); 982 983 for (int i=0; i<_NUM_CORE_HEAP; i++) { 984 stat_fields[i].pss_field = 985 env->GetFieldID(clazz, stat_field_names[i].pss_name, "I"); 986 stat_fields[i].pssSwappable_field = 987 env->GetFieldID(clazz, stat_field_names[i].pssSwappable_name, "I"); 988 stat_fields[i].privateDirty_field = 989 env->GetFieldID(clazz, stat_field_names[i].privateDirty_name, "I"); 990 stat_fields[i].sharedDirty_field = 991 env->GetFieldID(clazz, stat_field_names[i].sharedDirty_name, "I"); 992 stat_fields[i].privateClean_field = 993 env->GetFieldID(clazz, stat_field_names[i].privateClean_name, "I"); 994 stat_fields[i].sharedClean_field = 995 env->GetFieldID(clazz, stat_field_names[i].sharedClean_name, "I"); 996 stat_fields[i].swappedOut_field = 997 env->GetFieldID(clazz, stat_field_names[i].swappedOut_name, "I"); 998 } 999 1000 return jniRegisterNativeMethods(env, "android/os/Debug", gMethods, NELEM(gMethods)); 1001 } 1002 1003 }; // namespace android 1004
