android_os_Debug.cpp revision eee9764418d13176c9671e453775d476c2206f6c 
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 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
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    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
540static jlong android_os_Debug_getPss(JNIEnv *env, jobject clazz)
541{
542    return android_os_Debug_getPssPid(env, clazz, getpid(), NULL);
543}
544
545enum {
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
558static 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
656static 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
693static jint android_os_Debug_getBinderSentTransactions(JNIEnv *env, jobject clazz)
694{
695    return read_binder_stat("bcTRANSACTION");
696}
697
698static 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
704jint android_os_Debug_getLocalObjectCount(JNIEnv* env, jobject clazz);
705jint android_os_Debug_getProxyObjectCount(JNIEnv* env, jobject clazz);
706jint android_os_Debug_getDeathObjectCount(JNIEnv* env, jobject clazz);
707
708
709/* pulled out of bionic */
710extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
711    size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
712extern "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 */
721static 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 */
772static 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 */
853static 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
890static 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
923static 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
956int 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