android_os_Debug.cpp revision 99f628286f42d235f753d6d50bb1bf2a3196341f 
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
42namespace android
43{
44
45enum {
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
77struct 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
87struct 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
97static stat_fields stat_fields[_NUM_CORE_HEAP];
98
99static 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
108jfieldID otherStats_field;
109
110static bool memtrackLoaded;
111
112struct 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
124static 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
134static 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
144static 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
155struct 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 */
166static 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 */
202static 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
219static 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 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 temp;
232
233    uint64_t start;
234    uint64_t end = 0;
235    uint64_t prevEnd = 0;
236    char* name;
237    int name_pos;
238
239    int whichHeap = HEAP_UNKNOWN;
240    int subHeap = HEAP_UNKNOWN;
241    int prevHeap = HEAP_UNKNOWN;
242
243    if(fgets(line, sizeof(line), fp) == 0) return;
244
245    while (!done) {
246        prevHeap = whichHeap;
247        prevEnd = end;
248        whichHeap = HEAP_UNKNOWN;
249        subHeap = HEAP_UNKNOWN;
250        skip = false;
251        is_swappable = false;
252
253        len = strlen(line);
254        if (len < 1) return;
255        line[--len] = 0;
256
257        if (sscanf(line, "%" SCNx64 "-%" SCNx64 " %*s %*x %*x:%*x %*d%n", &start, &end, &name_pos) != 2) {
258            skip = true;
259        } else {
260            while (isspace(line[name_pos])) {
261                name_pos += 1;
262            }
263            name = line + name_pos;
264            nameLen = strlen(name);
265
266            if ((strstr(name, "[heap]") == name)) {
267                whichHeap = HEAP_NATIVE;
268            } else if (strncmp(name, "/dev/ashmem", 11) == 0) {
269                if (strncmp(name, "/dev/ashmem/dalvik-", 19) == 0) {
270                    whichHeap = HEAP_DALVIK_OTHER;
271                    if (strstr(name, "/dev/ashmem/dalvik-LinearAlloc") == name) {
272                        subHeap = HEAP_DALVIK_LINEARALLOC;
273                    } else if ((strstr(name, "/dev/ashmem/dalvik-alloc space") == name) ||
274                               (strstr(name, "/dev/ashmem/dalvik-main space") == name) ||
275                               (strstr(name, "/dev/ashmem/dalvik-zygote 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
404static 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
417static 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
477static void android_os_Debug_getDirtyPages(JNIEnv *env, jobject clazz, jobject object)
478{
479    android_os_Debug_getDirtyPagesPid(env, clazz, getpid(), object);
480}
481
482static 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
488    char tmp[128];
489    FILE *fp;
490
491    struct graphics_memory_pss graphics_mem;
492    if (read_memtrack_memory(pid, &graphics_mem) == 0) {
493        pss = uss = graphics_mem.graphics + graphics_mem.gl + graphics_mem.other;
494    }
495
496    sprintf(tmp, "/proc/%d/smaps", pid);
497    fp = fopen(tmp, "r");
498
499    if (fp != 0) {
500        while (true) {
501            if (fgets(line, 1024, fp) == NULL) {
502                break;
503            }
504
505            if (line[0] == 'P') {
506                if (strncmp(line, "Pss:", 4) == 0) {
507                    char* c = line + 4;
508                    while (*c != 0 && (*c < '0' || *c > '9')) {
509                        c++;
510                    }
511                    pss += atoi(c);
512                } else if (strncmp(line, "Private_Clean:", 14)
513                        || strncmp(line, "Private_Dirty:", 14)) {
514                    char* c = line + 14;
515                    while (*c != 0 && (*c < '0' || *c > '9')) {
516                        c++;
517                    }
518                    uss += atoi(c);
519                }
520            }
521        }
522
523        fclose(fp);
524    }
525
526    if (outUss != NULL) {
527        if (env->GetArrayLength(outUss) >= 1) {
528            jlong* outUssArray = env->GetLongArrayElements(outUss, 0);
529            if (outUssArray != NULL) {
530                outUssArray[0] = uss;
531            }
532            env->ReleaseLongArrayElements(outUss, outUssArray, 0);
533        }
534    }
535
536    return pss;
537}
538
539static jlong android_os_Debug_getPss(JNIEnv *env, jobject clazz)
540{
541    return android_os_Debug_getPssPid(env, clazz, getpid(), NULL);
542}
543
544enum {
545    MEMINFO_TOTAL,
546    MEMINFO_FREE,
547    MEMINFO_BUFFERS,
548    MEMINFO_CACHED,
549    MEMINFO_SHMEM,
550    MEMINFO_SLAB,
551    MEMINFO_SWAP_TOTAL,
552    MEMINFO_SWAP_FREE,
553    MEMINFO_ZRAM_TOTAL,
554    MEMINFO_COUNT
555};
556
557static void android_os_Debug_getMemInfo(JNIEnv *env, jobject clazz, jlongArray out)
558{
559    char buffer[1024];
560    int numFound = 0;
561
562    if (out == NULL) {
563        jniThrowNullPointerException(env, "out == null");
564        return;
565    }
566
567    int fd = open("/proc/meminfo", O_RDONLY);
568
569    if (fd < 0) {
570        ALOGW("Unable to open /proc/meminfo: %s\n", strerror(errno));
571        return;
572    }
573
574    int len = read(fd, buffer, sizeof(buffer)-1);
575    close(fd);
576
577    if (len < 0) {
578        ALOGW("Empty /proc/meminfo");
579        return;
580    }
581    buffer[len] = 0;
582
583    static const char* const tags[] = {
584            "MemTotal:",
585            "MemFree:",
586            "Buffers:",
587            "Cached:",
588            "Shmem:",
589            "Slab:",
590            "SwapTotal:",
591            "SwapFree:",
592            NULL
593    };
594    static const int tagsLen[] = {
595            9,
596            8,
597            8,
598            7,
599            6,
600            5,
601            10,
602            9,
603            0
604    };
605    long mem[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
606
607    char* p = buffer;
608    while (*p && numFound < 8) {
609        int i = 0;
610        while (tags[i]) {
611            if (strncmp(p, tags[i], tagsLen[i]) == 0) {
612                p += tagsLen[i];
613                while (*p == ' ') p++;
614                char* num = p;
615                while (*p >= '0' && *p <= '9') p++;
616                if (*p != 0) {
617                    *p = 0;
618                    p++;
619                }
620                mem[i] = atoll(num);
621                numFound++;
622                break;
623            }
624            i++;
625        }
626        while (*p && *p != '\n') {
627            p++;
628        }
629        if (*p) p++;
630    }
631
632    fd = open("/sys/block/zram0/mem_used_total", O_RDONLY);
633    if (fd >= 0) {
634        len = read(fd, buffer, sizeof(buffer)-1);
635        close(fd);
636        if (len > 0) {
637            buffer[len] = 0;
638            mem[MEMINFO_ZRAM_TOTAL] = atoll(buffer)/1024;
639        }
640    }
641
642    int maxNum = env->GetArrayLength(out);
643    if (maxNum > MEMINFO_COUNT) {
644        maxNum = MEMINFO_COUNT;
645    }
646    jlong* outArray = env->GetLongArrayElements(out, 0);
647    if (outArray != NULL) {
648        for (int i=0; i<maxNum; i++) {
649            outArray[i] = mem[i];
650        }
651    }
652    env->ReleaseLongArrayElements(out, outArray, 0);
653}
654
655static jint read_binder_stat(const char* stat)
656{
657    FILE* fp = fopen(BINDER_STATS, "r");
658    if (fp == NULL) {
659        return -1;
660    }
661
662    char line[1024];
663
664    char compare[128];
665    int len = snprintf(compare, 128, "proc %d", getpid());
666
667    // loop until we have the block that represents this process
668    do {
669        if (fgets(line, 1024, fp) == 0) {
670            fclose(fp);
671            return -1;
672        }
673    } while (strncmp(compare, line, len));
674
675    // now that we have this process, read until we find the stat that we are looking for
676    len = snprintf(compare, 128, "  %s: ", stat);
677
678    do {
679        if (fgets(line, 1024, fp) == 0) {
680            fclose(fp);
681            return -1;
682        }
683    } while (strncmp(compare, line, len));
684
685    // we have the line, now increment the line ptr to the value
686    char* ptr = line + len;
687    jint result = atoi(ptr);
688    fclose(fp);
689    return result;
690}
691
692static jint android_os_Debug_getBinderSentTransactions(JNIEnv *env, jobject clazz)
693{
694    return read_binder_stat("bcTRANSACTION");
695}
696
697static jint android_os_getBinderReceivedTransactions(JNIEnv *env, jobject clazz)
698{
699    return read_binder_stat("brTRANSACTION");
700}
701
702// these are implemented in android_util_Binder.cpp
703jint android_os_Debug_getLocalObjectCount(JNIEnv* env, jobject clazz);
704jint android_os_Debug_getProxyObjectCount(JNIEnv* env, jobject clazz);
705jint android_os_Debug_getDeathObjectCount(JNIEnv* env, jobject clazz);
706
707
708/* pulled out of bionic */
709extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
710    size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
711extern "C" void free_malloc_leak_info(uint8_t* info);
712#define SIZE_FLAG_ZYGOTE_CHILD  (1<<31)
713#define BACKTRACE_SIZE          32
714
715/*
716 * This is a qsort() callback.
717 *
718 * See dumpNativeHeap() for comments about the data format and sort order.
719 */
720static int compareHeapRecords(const void* vrec1, const void* vrec2)
721{
722    const size_t* rec1 = (const size_t*) vrec1;
723    const size_t* rec2 = (const size_t*) vrec2;
724    size_t size1 = *rec1;
725    size_t size2 = *rec2;
726
727    if (size1 < size2) {
728        return 1;
729    } else if (size1 > size2) {
730        return -1;
731    }
732
733    intptr_t* bt1 = (intptr_t*)(rec1 + 2);
734    intptr_t* bt2 = (intptr_t*)(rec2 + 2);
735    for (size_t idx = 0; idx < BACKTRACE_SIZE; idx++) {
736        intptr_t addr1 = bt1[idx];
737        intptr_t addr2 = bt2[idx];
738        if (addr1 == addr2) {
739            if (addr1 == 0)
740                break;
741            continue;
742        }
743        if (addr1 < addr2) {
744            return -1;
745        } else if (addr1 > addr2) {
746            return 1;
747        }
748    }
749
750    return 0;
751}
752
753/*
754 * The get_malloc_leak_info() call returns an array of structs that
755 * look like this:
756 *
757 *   size_t size
758 *   size_t allocations
759 *   intptr_t backtrace[32]
760 *
761 * "size" is the size of the allocation, "backtrace" is a fixed-size
762 * array of function pointers, and "allocations" is the number of
763 * allocations with the exact same size and backtrace.
764 *
765 * The entries are sorted by descending total size (i.e. size*allocations)
766 * then allocation count.  For best results with "diff" we'd like to sort
767 * primarily by individual size then stack trace.  Since the entries are
768 * fixed-size, and we're allowed (by the current implementation) to mangle
769 * them, we can do this in place.
770 */
771static void dumpNativeHeap(FILE* fp)
772{
773    uint8_t* info = NULL;
774    size_t overallSize, infoSize, totalMemory, backtraceSize;
775
776    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory,
777        &backtraceSize);
778    if (info == NULL) {
779        fprintf(fp, "Native heap dump not available. To enable, run these"
780                    " commands (requires root):\n");
781        fprintf(fp, "$ adb shell setprop libc.debug.malloc 1\n");
782        fprintf(fp, "$ adb shell stop\n");
783        fprintf(fp, "$ adb shell start\n");
784        return;
785    }
786    assert(infoSize != 0);
787    assert(overallSize % infoSize == 0);
788
789    fprintf(fp, "Android Native Heap Dump v1.0\n\n");
790
791    size_t recordCount = overallSize / infoSize;
792    fprintf(fp, "Total memory: %zu\n", totalMemory);
793    fprintf(fp, "Allocation records: %zd\n", recordCount);
794    if (backtraceSize != BACKTRACE_SIZE) {
795        fprintf(fp, "WARNING: mismatched backtrace sizes (%zu vs. %d)\n",
796            backtraceSize, BACKTRACE_SIZE);
797    }
798    fprintf(fp, "\n");
799
800    /* re-sort the entries */
801    qsort(info, recordCount, infoSize, compareHeapRecords);
802
803    /* dump the entries to the file */
804    const uint8_t* ptr = info;
805    for (size_t idx = 0; idx < recordCount; idx++) {
806        size_t size = *(size_t*) ptr;
807        size_t allocations = *(size_t*) (ptr + sizeof(size_t));
808        intptr_t* backtrace = (intptr_t*) (ptr + sizeof(size_t) * 2);
809
810        fprintf(fp, "z %d  sz %8zu  num %4zu  bt",
811                (size & SIZE_FLAG_ZYGOTE_CHILD) != 0,
812                size & ~SIZE_FLAG_ZYGOTE_CHILD,
813                allocations);
814        for (size_t bt = 0; bt < backtraceSize; bt++) {
815            if (backtrace[bt] == 0) {
816                break;
817            } else {
818#ifdef __LP64__
819                fprintf(fp, " %016" PRIxPTR, backtrace[bt]);
820#else
821                fprintf(fp, " %08" PRIxPTR, backtrace[bt]);
822#endif
823            }
824        }
825        fprintf(fp, "\n");
826
827        ptr += infoSize;
828    }
829
830    free_malloc_leak_info(info);
831
832    fprintf(fp, "MAPS\n");
833    const char* maps = "/proc/self/maps";
834    FILE* in = fopen(maps, "r");
835    if (in == NULL) {
836        fprintf(fp, "Could not open %s\n", maps);
837        return;
838    }
839    char buf[BUFSIZ];
840    while (size_t n = fread(buf, sizeof(char), BUFSIZ, in)) {
841        fwrite(buf, sizeof(char), n, fp);
842    }
843    fclose(in);
844
845    fprintf(fp, "END\n");
846}
847
848/*
849 * Dump the native heap, writing human-readable output to the specified
850 * file descriptor.
851 */
852static void android_os_Debug_dumpNativeHeap(JNIEnv* env, jobject clazz,
853    jobject fileDescriptor)
854{
855    if (fileDescriptor == NULL) {
856        jniThrowNullPointerException(env, "fd == null");
857        return;
858    }
859    int origFd = jniGetFDFromFileDescriptor(env, fileDescriptor);
860    if (origFd < 0) {
861        jniThrowRuntimeException(env, "Invalid file descriptor");
862        return;
863    }
864
865    /* dup() the descriptor so we don't close the original with fclose() */
866    int fd = dup(origFd);
867    if (fd < 0) {
868        ALOGW("dup(%d) failed: %s\n", origFd, strerror(errno));
869        jniThrowRuntimeException(env, "dup() failed");
870        return;
871    }
872
873    FILE* fp = fdopen(fd, "w");
874    if (fp == NULL) {
875        ALOGW("fdopen(%d) failed: %s\n", fd, strerror(errno));
876        close(fd);
877        jniThrowRuntimeException(env, "fdopen() failed");
878        return;
879    }
880
881    ALOGD("Native heap dump starting...\n");
882    dumpNativeHeap(fp);
883    ALOGD("Native heap dump complete.\n");
884
885    fclose(fp);
886}
887
888
889static void android_os_Debug_dumpNativeBacktraceToFile(JNIEnv* env, jobject clazz,
890    jint pid, jstring fileName)
891{
892    if (fileName == NULL) {
893        jniThrowNullPointerException(env, "file == null");
894        return;
895    }
896    const jchar* str = env->GetStringCritical(fileName, 0);
897    String8 fileName8;
898    if (str) {
899        fileName8 = String8(str, env->GetStringLength(fileName));
900        env->ReleaseStringCritical(fileName, str);
901    }
902
903    int fd = open(fileName8.string(), O_CREAT | O_WRONLY | O_NOFOLLOW, 0666);  /* -rw-rw-rw- */
904    if (fd < 0) {
905        fprintf(stderr, "Can't open %s: %s\n", fileName8.string(), strerror(errno));
906        return;
907    }
908
909    if (lseek(fd, 0, SEEK_END) < 0) {
910        fprintf(stderr, "lseek: %s\n", strerror(errno));
911    } else {
912        dump_backtrace_to_file(pid, fd);
913    }
914
915    close(fd);
916}
917
918/*
919 * JNI registration.
920 */
921
922static JNINativeMethod gMethods[] = {
923    { "getNativeHeapSize",      "()J",
924            (void*) android_os_Debug_getNativeHeapSize },
925    { "getNativeHeapAllocatedSize", "()J",
926            (void*) android_os_Debug_getNativeHeapAllocatedSize },
927    { "getNativeHeapFreeSize",  "()J",
928            (void*) android_os_Debug_getNativeHeapFreeSize },
929    { "getMemoryInfo",          "(Landroid/os/Debug$MemoryInfo;)V",
930            (void*) android_os_Debug_getDirtyPages },
931    { "getMemoryInfo",          "(ILandroid/os/Debug$MemoryInfo;)V",
932            (void*) android_os_Debug_getDirtyPagesPid },
933    { "getPss",                 "()J",
934            (void*) android_os_Debug_getPss },
935    { "getPss",                 "(I[J)J",
936            (void*) android_os_Debug_getPssPid },
937    { "getMemInfo",             "([J)V",
938            (void*) android_os_Debug_getMemInfo },
939    { "dumpNativeHeap",         "(Ljava/io/FileDescriptor;)V",
940            (void*) android_os_Debug_dumpNativeHeap },
941    { "getBinderSentTransactions", "()I",
942            (void*) android_os_Debug_getBinderSentTransactions },
943    { "getBinderReceivedTransactions", "()I",
944            (void*) android_os_getBinderReceivedTransactions },
945    { "getBinderLocalObjectCount", "()I",
946            (void*)android_os_Debug_getLocalObjectCount },
947    { "getBinderProxyObjectCount", "()I",
948            (void*)android_os_Debug_getProxyObjectCount },
949    { "getBinderDeathObjectCount", "()I",
950            (void*)android_os_Debug_getDeathObjectCount },
951    { "dumpNativeBacktraceToFile", "(ILjava/lang/String;)V",
952            (void*)android_os_Debug_dumpNativeBacktraceToFile },
953};
954
955int register_android_os_Debug(JNIEnv *env)
956{
957    int err = memtrack_init();
958    if (err != 0) {
959        memtrackLoaded = false;
960        ALOGE("failed to load memtrack module: %d", err);
961    } else {
962        memtrackLoaded = true;
963    }
964
965    jclass clazz = env->FindClass("android/os/Debug$MemoryInfo");
966
967    // Sanity check the number of other statistics expected in Java matches here.
968    jfieldID numOtherStats_field = env->GetStaticFieldID(clazz, "NUM_OTHER_STATS", "I");
969    jint numOtherStats = env->GetStaticIntField(clazz, numOtherStats_field);
970    jfieldID numDvkStats_field = env->GetStaticFieldID(clazz, "NUM_DVK_STATS", "I");
971    jint numDvkStats = env->GetStaticIntField(clazz, numDvkStats_field);
972    int expectedNumOtherStats = _NUM_HEAP - _NUM_CORE_HEAP;
973    if ((numOtherStats + numDvkStats) != expectedNumOtherStats) {
974        jniThrowExceptionFmt(env, "java/lang/RuntimeException",
975                             "android.os.Debug.Meminfo.NUM_OTHER_STATS+android.os.Debug.Meminfo.NUM_DVK_STATS=%d expected %d",
976                             numOtherStats+numDvkStats, expectedNumOtherStats);
977        return JNI_ERR;
978    }
979
980    otherStats_field = env->GetFieldID(clazz, "otherStats", "[I");
981
982    for (int i=0; i<_NUM_CORE_HEAP; i++) {
983        stat_fields[i].pss_field =
984                env->GetFieldID(clazz, stat_field_names[i].pss_name, "I");
985        stat_fields[i].pssSwappable_field =
986                env->GetFieldID(clazz, stat_field_names[i].pssSwappable_name, "I");
987        stat_fields[i].privateDirty_field =
988                env->GetFieldID(clazz, stat_field_names[i].privateDirty_name, "I");
989        stat_fields[i].sharedDirty_field =
990                env->GetFieldID(clazz, stat_field_names[i].sharedDirty_name, "I");
991        stat_fields[i].privateClean_field =
992                env->GetFieldID(clazz, stat_field_names[i].privateClean_name, "I");
993        stat_fields[i].sharedClean_field =
994                env->GetFieldID(clazz, stat_field_names[i].sharedClean_name, "I");
995        stat_fields[i].swappedOut_field =
996                env->GetFieldID(clazz, stat_field_names[i].swappedOut_name, "I");
997    }
998
999    return jniRegisterNativeMethods(env, "android/os/Debug", gMethods, NELEM(gMethods));
1000}
1001
1002}; // namespace android
1003