android_os_Debug.cpp revision c4fb5f9d4b8012bc007f0c7e472d4ff4801254f5 
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#include <memunreachable/memunreachable.h>
25
26#include <cutils/log.h>
27#include <fcntl.h>
28#include <inttypes.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <unistd.h>
33#include <time.h>
34#include <sys/time.h>
35#include <errno.h>
36#include <assert.h>
37#include <ctype.h>
38#include <malloc.h>
39
40#include <iomanip>
41#include <string>
42
43namespace android
44{
45
46enum {
47    HEAP_UNKNOWN,
48    HEAP_DALVIK,
49    HEAP_NATIVE,
50
51    HEAP_DALVIK_OTHER,
52    HEAP_STACK,
53    HEAP_CURSOR,
54    HEAP_ASHMEM,
55    HEAP_GL_DEV,
56    HEAP_UNKNOWN_DEV,
57    HEAP_SO,
58    HEAP_JAR,
59    HEAP_APK,
60    HEAP_TTF,
61    HEAP_DEX,
62    HEAP_OAT,
63    HEAP_ART,
64    HEAP_UNKNOWN_MAP,
65    HEAP_GRAPHICS,
66    HEAP_GL,
67    HEAP_OTHER_MEMTRACK,
68
69    HEAP_DALVIK_NORMAL,
70    HEAP_DALVIK_LARGE,
71    HEAP_DALVIK_LINEARALLOC,
72    HEAP_DALVIK_ACCOUNTING,
73    HEAP_DALVIK_CODE_CACHE,
74    HEAP_DALVIK_ZYGOTE,
75    HEAP_DALVIK_NON_MOVING,
76    HEAP_DALVIK_INDIRECT_REFERENCE_TABLE,
77
78    _NUM_HEAP,
79    _NUM_EXCLUSIVE_HEAP = HEAP_OTHER_MEMTRACK+1,
80    _NUM_CORE_HEAP = HEAP_NATIVE+1
81};
82
83struct stat_fields {
84    jfieldID pss_field;
85    jfieldID pssSwappable_field;
86    jfieldID privateDirty_field;
87    jfieldID sharedDirty_field;
88    jfieldID privateClean_field;
89    jfieldID sharedClean_field;
90    jfieldID swappedOut_field;
91    jfieldID swappedOutPss_field;
92};
93
94struct stat_field_names {
95    const char* pss_name;
96    const char* pssSwappable_name;
97    const char* privateDirty_name;
98    const char* sharedDirty_name;
99    const char* privateClean_name;
100    const char* sharedClean_name;
101    const char* swappedOut_name;
102    const char* swappedOutPss_name;
103};
104
105static stat_fields stat_fields[_NUM_CORE_HEAP];
106
107static stat_field_names stat_field_names[_NUM_CORE_HEAP] = {
108    { "otherPss", "otherSwappablePss", "otherPrivateDirty", "otherSharedDirty",
109        "otherPrivateClean", "otherSharedClean", "otherSwappedOut", "otherSwappedOutPss" },
110    { "dalvikPss", "dalvikSwappablePss", "dalvikPrivateDirty", "dalvikSharedDirty",
111        "dalvikPrivateClean", "dalvikSharedClean", "dalvikSwappedOut", "dalvikSwappedOutPss" },
112    { "nativePss", "nativeSwappablePss", "nativePrivateDirty", "nativeSharedDirty",
113        "nativePrivateClean", "nativeSharedClean", "nativeSwappedOut", "nativeSwappedOutPss" }
114};
115
116jfieldID otherStats_field;
117jfieldID hasSwappedOutPss_field;
118
119static bool memtrackLoaded;
120
121struct stats_t {
122    int pss;
123    int swappablePss;
124    int privateDirty;
125    int sharedDirty;
126    int privateClean;
127    int sharedClean;
128    int swappedOut;
129    int swappedOutPss;
130};
131
132#define BINDER_STATS "/proc/binder/stats"
133
134static jlong android_os_Debug_getNativeHeapSize(JNIEnv *env, jobject clazz)
135{
136    struct mallinfo info = mallinfo();
137    return (jlong) info.usmblks;
138}
139
140static jlong android_os_Debug_getNativeHeapAllocatedSize(JNIEnv *env, jobject clazz)
141{
142    struct mallinfo info = mallinfo();
143    return (jlong) info.uordblks;
144}
145
146static jlong android_os_Debug_getNativeHeapFreeSize(JNIEnv *env, jobject clazz)
147{
148    struct mallinfo info = mallinfo();
149    return (jlong) info.fordblks;
150}
151
152// Container used to retrieve graphics memory pss
153struct graphics_memory_pss
154{
155    int graphics;
156    int gl;
157    int other;
158};
159
160/*
161 * Uses libmemtrack to retrieve graphics memory that the process is using.
162 * Any graphics memory reported in /proc/pid/smaps is not included here.
163 */
164static int read_memtrack_memory(struct memtrack_proc* p, int pid,
165        struct graphics_memory_pss* graphics_mem)
166{
167    int err = memtrack_proc_get(p, pid);
168    if (err != 0) {
169        ALOGW("failed to get memory consumption info: %d", err);
170        return err;
171    }
172
173    ssize_t pss = memtrack_proc_graphics_pss(p);
174    if (pss < 0) {
175        ALOGW("failed to get graphics pss: %zd", pss);
176        return pss;
177    }
178    graphics_mem->graphics = pss / 1024;
179
180    pss = memtrack_proc_gl_pss(p);
181    if (pss < 0) {
182        ALOGW("failed to get gl pss: %zd", pss);
183        return pss;
184    }
185    graphics_mem->gl = pss / 1024;
186
187    pss = memtrack_proc_other_pss(p);
188    if (pss < 0) {
189        ALOGW("failed to get other pss: %zd", pss);
190        return pss;
191    }
192    graphics_mem->other = pss / 1024;
193
194    return 0;
195}
196
197/*
198 * Retrieves the graphics memory that is unaccounted for in /proc/pid/smaps.
199 */
200static int read_memtrack_memory(int pid, struct graphics_memory_pss* graphics_mem)
201{
202    if (!memtrackLoaded) {
203        return -1;
204    }
205
206    struct memtrack_proc* p = memtrack_proc_new();
207    if (p == NULL) {
208        ALOGW("failed to create memtrack_proc");
209        return -1;
210    }
211
212    int err = read_memtrack_memory(p, pid, graphics_mem);
213    memtrack_proc_destroy(p);
214    return err;
215}
216
217static void read_mapinfo(FILE *fp, stats_t* stats, bool* foundSwapPss)
218{
219    char line[1024];
220    int len, nameLen;
221    bool skip, done = false;
222
223    unsigned pss = 0, swappable_pss = 0;
224    float sharing_proportion = 0.0;
225    unsigned shared_clean = 0, shared_dirty = 0;
226    unsigned private_clean = 0, private_dirty = 0;
227    unsigned swapped_out = 0, swapped_out_pss = 0;
228    bool is_swappable = false;
229    unsigned temp;
230
231    uint64_t start;
232    uint64_t end = 0;
233    uint64_t prevEnd = 0;
234    char* name;
235    int name_pos;
236
237    int whichHeap = HEAP_UNKNOWN;
238    int subHeap = HEAP_UNKNOWN;
239    int prevHeap = HEAP_UNKNOWN;
240
241    *foundSwapPss = false;
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, "[anon:libc_malloc]", 18) == 0) {
269                whichHeap = HEAP_NATIVE;
270            } else if (strncmp(name, "[stack", 6) == 0) {
271                whichHeap = HEAP_STACK;
272            } else if (nameLen > 3 && strcmp(name+nameLen-3, ".so") == 0) {
273                whichHeap = HEAP_SO;
274                is_swappable = true;
275            } else if (nameLen > 4 && strcmp(name+nameLen-4, ".jar") == 0) {
276                whichHeap = HEAP_JAR;
277                is_swappable = true;
278            } else if (nameLen > 4 && strcmp(name+nameLen-4, ".apk") == 0) {
279                whichHeap = HEAP_APK;
280                is_swappable = true;
281            } else if (nameLen > 4 && strcmp(name+nameLen-4, ".ttf") == 0) {
282                whichHeap = HEAP_TTF;
283                is_swappable = true;
284            } else if ((nameLen > 4 && strstr(name, ".dex") != NULL) ||
285                       (nameLen > 5 && strcmp(name+nameLen-5, ".odex") == 0)) {
286                whichHeap = HEAP_DEX;
287                is_swappable = true;
288            } else if (nameLen > 4 && strcmp(name+nameLen-4, ".oat") == 0) {
289                whichHeap = HEAP_OAT;
290                is_swappable = true;
291            } else if (nameLen > 4 && strcmp(name+nameLen-4, ".art") == 0) {
292                whichHeap = HEAP_ART;
293                is_swappable = true;
294            } else if (strncmp(name, "/dev/", 5) == 0) {
295                if (strncmp(name, "/dev/kgsl-3d0", 13) == 0) {
296                    whichHeap = HEAP_GL_DEV;
297                } else if (strncmp(name, "/dev/ashmem", 11) == 0) {
298                    if (strncmp(name, "/dev/ashmem/dalvik-", 19) == 0) {
299                        whichHeap = HEAP_DALVIK_OTHER;
300                        if (strstr(name, "/dev/ashmem/dalvik-LinearAlloc") == name) {
301                            subHeap = HEAP_DALVIK_LINEARALLOC;
302                        } else if ((strstr(name, "/dev/ashmem/dalvik-alloc space") == name) ||
303                                   (strstr(name, "/dev/ashmem/dalvik-main space") == name)) {
304                            // This is the regular Dalvik heap.
305                            whichHeap = HEAP_DALVIK;
306                            subHeap = HEAP_DALVIK_NORMAL;
307                        } else if (strstr(name, "/dev/ashmem/dalvik-large object space") == name ||
308                                   strstr(name, "/dev/ashmem/dalvik-free list large object space")
309                                       == name) {
310                            whichHeap = HEAP_DALVIK;
311                            subHeap = HEAP_DALVIK_LARGE;
312                        } else if (strstr(name, "/dev/ashmem/dalvik-non moving space") == name) {
313                            whichHeap = HEAP_DALVIK;
314                            subHeap = HEAP_DALVIK_NON_MOVING;
315                        } else if (strstr(name, "/dev/ashmem/dalvik-zygote space") == name) {
316                            whichHeap = HEAP_DALVIK;
317                            subHeap = HEAP_DALVIK_ZYGOTE;
318                        } else if (strstr(name, "/dev/ashmem/dalvik-indirect ref") == name) {
319                            subHeap = HEAP_DALVIK_INDIRECT_REFERENCE_TABLE;
320                        } else if (strstr(name, "/dev/ashmem/dalvik-jit-code-cache") == name) {
321                            subHeap = HEAP_DALVIK_CODE_CACHE;
322                        } else {
323                            subHeap = HEAP_DALVIK_ACCOUNTING;  // Default to accounting.
324                        }
325                    } else if (strncmp(name, "/dev/ashmem/CursorWindow", 24) == 0) {
326                        whichHeap = HEAP_CURSOR;
327                    } else if (strncmp(name, "/dev/ashmem/libc malloc", 23) == 0) {
328                        whichHeap = HEAP_NATIVE;
329                    } else {
330                        whichHeap = HEAP_ASHMEM;
331                    }
332                } else {
333                    whichHeap = HEAP_UNKNOWN_DEV;
334                }
335            } else if (strncmp(name, "[anon:", 6) == 0) {
336                whichHeap = HEAP_UNKNOWN;
337            } else if (nameLen > 0) {
338                whichHeap = HEAP_UNKNOWN_MAP;
339            } else if (start == prevEnd && prevHeap == HEAP_SO) {
340                // bss section of a shared library.
341                whichHeap = HEAP_SO;
342            }
343        }
344
345        //ALOGI("native=%d dalvik=%d sqlite=%d: %s\n", isNativeHeap, isDalvikHeap,
346        //    isSqliteHeap, line);
347
348        shared_clean = 0;
349        shared_dirty = 0;
350        private_clean = 0;
351        private_dirty = 0;
352        swapped_out = 0;
353        swapped_out_pss = 0;
354
355        while (true) {
356            if (fgets(line, 1024, fp) == 0) {
357                done = true;
358                break;
359            }
360
361            if (line[0] == 'S' && sscanf(line, "Size: %d kB", &temp) == 1) {
362                /* size = temp; */
363            } else if (line[0] == 'R' && sscanf(line, "Rss: %d kB", &temp) == 1) {
364                /* resident = temp; */
365            } else if (line[0] == 'P' && sscanf(line, "Pss: %d kB", &temp) == 1) {
366                pss = temp;
367            } else if (line[0] == 'S' && sscanf(line, "Shared_Clean: %d kB", &temp) == 1) {
368                shared_clean = temp;
369            } else if (line[0] == 'S' && sscanf(line, "Shared_Dirty: %d kB", &temp) == 1) {
370                shared_dirty = temp;
371            } else if (line[0] == 'P' && sscanf(line, "Private_Clean: %d kB", &temp) == 1) {
372                private_clean = temp;
373            } else if (line[0] == 'P' && sscanf(line, "Private_Dirty: %d kB", &temp) == 1) {
374                private_dirty = temp;
375            } else if (line[0] == 'R' && sscanf(line, "Referenced: %d kB", &temp) == 1) {
376                /* referenced = temp; */
377            } else if (line[0] == 'S' && sscanf(line, "Swap: %d kB", &temp) == 1) {
378                swapped_out = temp;
379            } else if (line[0] == 'S' && sscanf(line, "SwapPss: %d kB", &temp) == 1) {
380                *foundSwapPss = true;
381                swapped_out_pss = temp;
382            } else if (sscanf(line, "%" SCNx64 "-%" SCNx64 " %*s %*x %*x:%*x %*d", &start, &end) == 2) {
383                // looks like a new mapping
384                // example: "10000000-10001000 ---p 10000000 00:00 0"
385                break;
386            }
387        }
388
389        if (!skip) {
390            if (is_swappable && (pss > 0)) {
391                sharing_proportion = 0.0;
392                if ((shared_clean > 0) || (shared_dirty > 0)) {
393                    sharing_proportion = (pss - private_clean
394                            - private_dirty)/(shared_clean+shared_dirty);
395                }
396                swappable_pss = (sharing_proportion*shared_clean) + private_clean;
397            } else
398                swappable_pss = 0;
399
400            stats[whichHeap].pss += pss;
401            stats[whichHeap].swappablePss += swappable_pss;
402            stats[whichHeap].privateDirty += private_dirty;
403            stats[whichHeap].sharedDirty += shared_dirty;
404            stats[whichHeap].privateClean += private_clean;
405            stats[whichHeap].sharedClean += shared_clean;
406            stats[whichHeap].swappedOut += swapped_out;
407            stats[whichHeap].swappedOutPss += swapped_out_pss;
408            if (whichHeap == HEAP_DALVIK || whichHeap == HEAP_DALVIK_OTHER) {
409                stats[subHeap].pss += pss;
410                stats[subHeap].swappablePss += swappable_pss;
411                stats[subHeap].privateDirty += private_dirty;
412                stats[subHeap].sharedDirty += shared_dirty;
413                stats[subHeap].privateClean += private_clean;
414                stats[subHeap].sharedClean += shared_clean;
415                stats[subHeap].swappedOut += swapped_out;
416                stats[subHeap].swappedOutPss += swapped_out_pss;
417            }
418        }
419    }
420}
421
422static void load_maps(int pid, stats_t* stats, bool* foundSwapPss)
423{
424    char tmp[128];
425    FILE *fp;
426
427    sprintf(tmp, "/proc/%d/smaps", pid);
428    fp = fopen(tmp, "r");
429    if (fp == 0) return;
430
431    read_mapinfo(fp, stats, foundSwapPss);
432    fclose(fp);
433}
434
435static void android_os_Debug_getDirtyPagesPid(JNIEnv *env, jobject clazz,
436        jint pid, jobject object)
437{
438    bool foundSwapPss;
439    stats_t stats[_NUM_HEAP];
440    memset(&stats, 0, sizeof(stats));
441
442    load_maps(pid, stats, &foundSwapPss);
443
444    struct graphics_memory_pss graphics_mem;
445    if (read_memtrack_memory(pid, &graphics_mem) == 0) {
446        stats[HEAP_GRAPHICS].pss = graphics_mem.graphics;
447        stats[HEAP_GRAPHICS].privateDirty = graphics_mem.graphics;
448        stats[HEAP_GL].pss = graphics_mem.gl;
449        stats[HEAP_GL].privateDirty = graphics_mem.gl;
450        stats[HEAP_OTHER_MEMTRACK].pss = graphics_mem.other;
451        stats[HEAP_OTHER_MEMTRACK].privateDirty = graphics_mem.other;
452    }
453
454    for (int i=_NUM_CORE_HEAP; i<_NUM_EXCLUSIVE_HEAP; i++) {
455        stats[HEAP_UNKNOWN].pss += stats[i].pss;
456        stats[HEAP_UNKNOWN].swappablePss += stats[i].swappablePss;
457        stats[HEAP_UNKNOWN].privateDirty += stats[i].privateDirty;
458        stats[HEAP_UNKNOWN].sharedDirty += stats[i].sharedDirty;
459        stats[HEAP_UNKNOWN].privateClean += stats[i].privateClean;
460        stats[HEAP_UNKNOWN].sharedClean += stats[i].sharedClean;
461        stats[HEAP_UNKNOWN].swappedOut += stats[i].swappedOut;
462        stats[HEAP_UNKNOWN].swappedOutPss += stats[i].swappedOutPss;
463    }
464
465    for (int i=0; i<_NUM_CORE_HEAP; i++) {
466        env->SetIntField(object, stat_fields[i].pss_field, stats[i].pss);
467        env->SetIntField(object, stat_fields[i].pssSwappable_field, stats[i].swappablePss);
468        env->SetIntField(object, stat_fields[i].privateDirty_field, stats[i].privateDirty);
469        env->SetIntField(object, stat_fields[i].sharedDirty_field, stats[i].sharedDirty);
470        env->SetIntField(object, stat_fields[i].privateClean_field, stats[i].privateClean);
471        env->SetIntField(object, stat_fields[i].sharedClean_field, stats[i].sharedClean);
472        env->SetIntField(object, stat_fields[i].swappedOut_field, stats[i].swappedOut);
473        env->SetIntField(object, stat_fields[i].swappedOutPss_field, stats[i].swappedOutPss);
474    }
475
476
477    env->SetBooleanField(object, hasSwappedOutPss_field, foundSwapPss);
478    jintArray otherIntArray = (jintArray)env->GetObjectField(object, otherStats_field);
479
480    jint* otherArray = (jint*)env->GetPrimitiveArrayCritical(otherIntArray, 0);
481    if (otherArray == NULL) {
482        return;
483    }
484
485    int j=0;
486    for (int i=_NUM_CORE_HEAP; i<_NUM_HEAP; i++) {
487        otherArray[j++] = stats[i].pss;
488        otherArray[j++] = stats[i].swappablePss;
489        otherArray[j++] = stats[i].privateDirty;
490        otherArray[j++] = stats[i].sharedDirty;
491        otherArray[j++] = stats[i].privateClean;
492        otherArray[j++] = stats[i].sharedClean;
493        otherArray[j++] = stats[i].swappedOut;
494        otherArray[j++] = stats[i].swappedOutPss;
495    }
496
497    env->ReleasePrimitiveArrayCritical(otherIntArray, otherArray, 0);
498}
499
500static void android_os_Debug_getDirtyPages(JNIEnv *env, jobject clazz, jobject object)
501{
502    android_os_Debug_getDirtyPagesPid(env, clazz, getpid(), object);
503}
504
505static jlong android_os_Debug_getPssPid(JNIEnv *env, jobject clazz, jint pid,
506        jlongArray outUssSwapPss, jlongArray outMemtrack)
507{
508    char line[1024];
509    jlong pss = 0;
510    jlong swapPss = 0;
511    jlong uss = 0;
512    jlong memtrack = 0;
513
514    char tmp[128];
515    FILE *fp;
516
517    struct graphics_memory_pss graphics_mem;
518    if (read_memtrack_memory(pid, &graphics_mem) == 0) {
519        pss = uss = memtrack = graphics_mem.graphics + graphics_mem.gl + graphics_mem.other;
520    }
521
522    sprintf(tmp, "/proc/%d/smaps", pid);
523    fp = fopen(tmp, "r");
524
525    if (fp != 0) {
526        while (true) {
527            if (fgets(line, 1024, fp) == NULL) {
528                break;
529            }
530
531            if (line[0] == 'P') {
532                if (strncmp(line, "Pss:", 4) == 0) {
533                    char* c = line + 4;
534                    while (*c != 0 && (*c < '0' || *c > '9')) {
535                        c++;
536                    }
537                    pss += atoi(c);
538                } else if (strncmp(line, "Private_Clean:", 14) == 0
539                        || strncmp(line, "Private_Dirty:", 14) == 0) {
540                    char* c = line + 14;
541                    while (*c != 0 && (*c < '0' || *c > '9')) {
542                        c++;
543                    }
544                    uss += atoi(c);
545                }
546            } else if (line[0] == 'S' && strncmp(line, "SwapPss:", 8) == 0) {
547                char* c = line + 8;
548                jlong lSwapPss;
549                while (*c != 0 && (*c < '0' || *c > '9')) {
550                    c++;
551                }
552                lSwapPss = atoi(c);
553                swapPss += lSwapPss;
554                pss += lSwapPss; // Also in swap, those pages would be accounted as Pss without SWAP
555            }
556        }
557
558        fclose(fp);
559    }
560
561    if (outUssSwapPss != NULL) {
562        if (env->GetArrayLength(outUssSwapPss) >= 1) {
563            jlong* outUssSwapPssArray = env->GetLongArrayElements(outUssSwapPss, 0);
564            if (outUssSwapPssArray != NULL) {
565                outUssSwapPssArray[0] = uss;
566                if (env->GetArrayLength(outUssSwapPss) >= 2) {
567                    outUssSwapPssArray[1] = swapPss;
568                }
569            }
570            env->ReleaseLongArrayElements(outUssSwapPss, outUssSwapPssArray, 0);
571        }
572    }
573
574    if (outMemtrack != NULL) {
575        if (env->GetArrayLength(outMemtrack) >= 1) {
576            jlong* outMemtrackArray = env->GetLongArrayElements(outMemtrack, 0);
577            if (outMemtrackArray != NULL) {
578                outMemtrackArray[0] = memtrack;
579            }
580            env->ReleaseLongArrayElements(outMemtrack, outMemtrackArray, 0);
581        }
582    }
583
584    return pss;
585}
586
587static jlong android_os_Debug_getPss(JNIEnv *env, jobject clazz)
588{
589    return android_os_Debug_getPssPid(env, clazz, getpid(), NULL, NULL);
590}
591
592static long get_allocated_vmalloc_memory() {
593    char line[1024];
594    long size, vmalloc_allocated_size = 0;
595    FILE* fp = fopen("/proc/vmallocinfo", "r");
596    if (fp == NULL) {
597        return 0;
598    }
599    while (true) {
600        if (fgets(line, 1024, fp) == NULL) {
601            break;
602        }
603
604        if (!strstr(line, "ioremap") && !strstr(line, "map_lowmem")) {
605            // Ignore ioremap and map_lowmem regions, since they don't actually consume memory
606            if (sscanf(line, "%*x-%*x %ld", &size) == 1) {
607                vmalloc_allocated_size += size;
608            }
609        }
610    }
611    fclose(fp);
612    return vmalloc_allocated_size;
613}
614
615enum {
616    MEMINFO_TOTAL,
617    MEMINFO_FREE,
618    MEMINFO_BUFFERS,
619    MEMINFO_CACHED,
620    MEMINFO_SHMEM,
621    MEMINFO_SLAB,
622    MEMINFO_SWAP_TOTAL,
623    MEMINFO_SWAP_FREE,
624    MEMINFO_ZRAM_TOTAL,
625    MEMINFO_MAPPED,
626    MEMINFO_VMALLOC_USED,
627    MEMINFO_PAGE_TABLES,
628    MEMINFO_KERNEL_STACK,
629    MEMINFO_COUNT
630};
631
632static long long get_zram_mem_used()
633{
634#define ZRAM_SYSFS "/sys/block/zram0/"
635    FILE *f = fopen(ZRAM_SYSFS "mm_stat", "r");
636    if (f) {
637        long long mem_used_total = 0;
638
639        int matched = fscanf(f, "%*d %*d %lld %*d %*d %*d %*d", &mem_used_total);
640        if (matched != 1)
641            ALOGW("failed to parse " ZRAM_SYSFS "mm_stat");
642
643        fclose(f);
644        return mem_used_total;
645    }
646
647    f = fopen(ZRAM_SYSFS "mem_used_total", "r");
648    if (f) {
649        long long mem_used_total = 0;
650
651        int matched = fscanf(f, "%lld", &mem_used_total);
652        if (matched != 1)
653            ALOGW("failed to parse " ZRAM_SYSFS "mem_used_total");
654
655        fclose(f);
656        return mem_used_total;
657    }
658
659    return 0;
660}
661
662static void android_os_Debug_getMemInfo(JNIEnv *env, jobject clazz, jlongArray out)
663{
664    char buffer[1024];
665    size_t numFound = 0;
666
667    if (out == NULL) {
668        jniThrowNullPointerException(env, "out == null");
669        return;
670    }
671
672    int fd = open("/proc/meminfo", O_RDONLY);
673
674    if (fd < 0) {
675        ALOGW("Unable to open /proc/meminfo: %s\n", strerror(errno));
676        return;
677    }
678
679    int len = read(fd, buffer, sizeof(buffer)-1);
680    close(fd);
681
682    if (len < 0) {
683        ALOGW("Empty /proc/meminfo");
684        return;
685    }
686    buffer[len] = 0;
687
688    static const char* const tags[] = {
689            "MemTotal:",
690            "MemFree:",
691            "Buffers:",
692            "Cached:",
693            "Shmem:",
694            "Slab:",
695            "SwapTotal:",
696            "SwapFree:",
697            "ZRam:",
698            "Mapped:",
699            "VmallocUsed:",
700            "PageTables:",
701            "KernelStack:",
702            NULL
703    };
704    static const int tagsLen[] = {
705            9,
706            8,
707            8,
708            7,
709            6,
710            5,
711            10,
712            9,
713            5,
714            7,
715            12,
716            11,
717            12,
718            0
719    };
720    long mem[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
721
722    char* p = buffer;
723    while (*p && numFound < (sizeof(tagsLen) / sizeof(tagsLen[0]))) {
724        int i = 0;
725        while (tags[i]) {
726            if (strncmp(p, tags[i], tagsLen[i]) == 0) {
727                p += tagsLen[i];
728                while (*p == ' ') p++;
729                char* num = p;
730                while (*p >= '0' && *p <= '9') p++;
731                if (*p != 0) {
732                    *p = 0;
733                    p++;
734                }
735                mem[i] = atoll(num);
736                numFound++;
737                break;
738            }
739            i++;
740        }
741        while (*p && *p != '\n') {
742            p++;
743        }
744        if (*p) p++;
745    }
746
747    mem[MEMINFO_ZRAM_TOTAL] = get_zram_mem_used() / 1024;
748    // Recompute Vmalloc Used since the value in meminfo
749    // doesn't account for I/O remapping which doesn't use RAM.
750    mem[MEMINFO_VMALLOC_USED] = get_allocated_vmalloc_memory() / 1024;
751
752    int maxNum = env->GetArrayLength(out);
753    if (maxNum > MEMINFO_COUNT) {
754        maxNum = MEMINFO_COUNT;
755    }
756    jlong* outArray = env->GetLongArrayElements(out, 0);
757    if (outArray != NULL) {
758        for (int i=0; i<maxNum; i++) {
759            outArray[i] = mem[i];
760        }
761    }
762    env->ReleaseLongArrayElements(out, outArray, 0);
763}
764
765
766static jint read_binder_stat(const char* stat)
767{
768    FILE* fp = fopen(BINDER_STATS, "r");
769    if (fp == NULL) {
770        return -1;
771    }
772
773    char line[1024];
774
775    char compare[128];
776    int len = snprintf(compare, 128, "proc %d", getpid());
777
778    // loop until we have the block that represents this process
779    do {
780        if (fgets(line, 1024, fp) == 0) {
781            fclose(fp);
782            return -1;
783        }
784    } while (strncmp(compare, line, len));
785
786    // now that we have this process, read until we find the stat that we are looking for
787    len = snprintf(compare, 128, "  %s: ", stat);
788
789    do {
790        if (fgets(line, 1024, fp) == 0) {
791            fclose(fp);
792            return -1;
793        }
794    } while (strncmp(compare, line, len));
795
796    // we have the line, now increment the line ptr to the value
797    char* ptr = line + len;
798    jint result = atoi(ptr);
799    fclose(fp);
800    return result;
801}
802
803static jint android_os_Debug_getBinderSentTransactions(JNIEnv *env, jobject clazz)
804{
805    return read_binder_stat("bcTRANSACTION");
806}
807
808static jint android_os_getBinderReceivedTransactions(JNIEnv *env, jobject clazz)
809{
810    return read_binder_stat("brTRANSACTION");
811}
812
813// these are implemented in android_util_Binder.cpp
814jint android_os_Debug_getLocalObjectCount(JNIEnv* env, jobject clazz);
815jint android_os_Debug_getProxyObjectCount(JNIEnv* env, jobject clazz);
816jint android_os_Debug_getDeathObjectCount(JNIEnv* env, jobject clazz);
817
818
819/* pulled out of bionic */
820extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
821    size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
822extern "C" void free_malloc_leak_info(uint8_t* info);
823#define SIZE_FLAG_ZYGOTE_CHILD  (1<<31)
824#define BACKTRACE_SIZE          32
825
826/*
827 * This is a qsort() callback.
828 *
829 * See dumpNativeHeap() for comments about the data format and sort order.
830 */
831static int compareHeapRecords(const void* vrec1, const void* vrec2)
832{
833    const size_t* rec1 = (const size_t*) vrec1;
834    const size_t* rec2 = (const size_t*) vrec2;
835    size_t size1 = *rec1;
836    size_t size2 = *rec2;
837
838    if (size1 < size2) {
839        return 1;
840    } else if (size1 > size2) {
841        return -1;
842    }
843
844    intptr_t* bt1 = (intptr_t*)(rec1 + 2);
845    intptr_t* bt2 = (intptr_t*)(rec2 + 2);
846    for (size_t idx = 0; idx < BACKTRACE_SIZE; idx++) {
847        intptr_t addr1 = bt1[idx];
848        intptr_t addr2 = bt2[idx];
849        if (addr1 == addr2) {
850            if (addr1 == 0)
851                break;
852            continue;
853        }
854        if (addr1 < addr2) {
855            return -1;
856        } else if (addr1 > addr2) {
857            return 1;
858        }
859    }
860
861    return 0;
862}
863
864/*
865 * The get_malloc_leak_info() call returns an array of structs that
866 * look like this:
867 *
868 *   size_t size
869 *   size_t allocations
870 *   intptr_t backtrace[32]
871 *
872 * "size" is the size of the allocation, "backtrace" is a fixed-size
873 * array of function pointers, and "allocations" is the number of
874 * allocations with the exact same size and backtrace.
875 *
876 * The entries are sorted by descending total size (i.e. size*allocations)
877 * then allocation count.  For best results with "diff" we'd like to sort
878 * primarily by individual size then stack trace.  Since the entries are
879 * fixed-size, and we're allowed (by the current implementation) to mangle
880 * them, we can do this in place.
881 */
882static void dumpNativeHeap(FILE* fp)
883{
884    uint8_t* info = NULL;
885    size_t overallSize, infoSize, totalMemory, backtraceSize;
886
887    get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory,
888        &backtraceSize);
889    if (info == NULL) {
890        fprintf(fp, "Native heap dump not available. To enable, run these"
891                    " commands (requires root):\n");
892        fprintf(fp, "$ adb shell setprop libc.debug.malloc 1\n");
893        fprintf(fp, "$ adb shell stop\n");
894        fprintf(fp, "$ adb shell start\n");
895        return;
896    }
897    assert(infoSize != 0);
898    assert(overallSize % infoSize == 0);
899
900    fprintf(fp, "Android Native Heap Dump v1.0\n\n");
901
902    size_t recordCount = overallSize / infoSize;
903    fprintf(fp, "Total memory: %zu\n", totalMemory);
904    fprintf(fp, "Allocation records: %zd\n", recordCount);
905    if (backtraceSize != BACKTRACE_SIZE) {
906        fprintf(fp, "WARNING: mismatched backtrace sizes (%zu vs. %d)\n",
907            backtraceSize, BACKTRACE_SIZE);
908    }
909    fprintf(fp, "\n");
910
911    /* re-sort the entries */
912    qsort(info, recordCount, infoSize, compareHeapRecords);
913
914    /* dump the entries to the file */
915    const uint8_t* ptr = info;
916    for (size_t idx = 0; idx < recordCount; idx++) {
917        size_t size = *(size_t*) ptr;
918        size_t allocations = *(size_t*) (ptr + sizeof(size_t));
919        intptr_t* backtrace = (intptr_t*) (ptr + sizeof(size_t) * 2);
920
921        fprintf(fp, "z %d  sz %8zu  num %4zu  bt",
922                (size & SIZE_FLAG_ZYGOTE_CHILD) != 0,
923                size & ~SIZE_FLAG_ZYGOTE_CHILD,
924                allocations);
925        for (size_t bt = 0; bt < backtraceSize; bt++) {
926            if (backtrace[bt] == 0) {
927                break;
928            } else {
929#ifdef __LP64__
930                fprintf(fp, " %016" PRIxPTR, backtrace[bt]);
931#else
932                fprintf(fp, " %08" PRIxPTR, backtrace[bt]);
933#endif
934            }
935        }
936        fprintf(fp, "\n");
937
938        ptr += infoSize;
939    }
940
941    free_malloc_leak_info(info);
942
943    fprintf(fp, "MAPS\n");
944    const char* maps = "/proc/self/maps";
945    FILE* in = fopen(maps, "r");
946    if (in == NULL) {
947        fprintf(fp, "Could not open %s\n", maps);
948        return;
949    }
950    char buf[BUFSIZ];
951    while (size_t n = fread(buf, sizeof(char), BUFSIZ, in)) {
952        fwrite(buf, sizeof(char), n, fp);
953    }
954    fclose(in);
955
956    fprintf(fp, "END\n");
957}
958
959/*
960 * Dump the native heap, writing human-readable output to the specified
961 * file descriptor.
962 */
963static void android_os_Debug_dumpNativeHeap(JNIEnv* env, jobject clazz,
964    jobject fileDescriptor)
965{
966    if (fileDescriptor == NULL) {
967        jniThrowNullPointerException(env, "fd == null");
968        return;
969    }
970    int origFd = jniGetFDFromFileDescriptor(env, fileDescriptor);
971    if (origFd < 0) {
972        jniThrowRuntimeException(env, "Invalid file descriptor");
973        return;
974    }
975
976    /* dup() the descriptor so we don't close the original with fclose() */
977    int fd = dup(origFd);
978    if (fd < 0) {
979        ALOGW("dup(%d) failed: %s\n", origFd, strerror(errno));
980        jniThrowRuntimeException(env, "dup() failed");
981        return;
982    }
983
984    FILE* fp = fdopen(fd, "w");
985    if (fp == NULL) {
986        ALOGW("fdopen(%d) failed: %s\n", fd, strerror(errno));
987        close(fd);
988        jniThrowRuntimeException(env, "fdopen() failed");
989        return;
990    }
991
992    ALOGD("Native heap dump starting...\n");
993    dumpNativeHeap(fp);
994    ALOGD("Native heap dump complete.\n");
995
996    fclose(fp);
997}
998
999
1000static void android_os_Debug_dumpNativeBacktraceToFile(JNIEnv* env, jobject clazz,
1001    jint pid, jstring fileName)
1002{
1003    if (fileName == NULL) {
1004        jniThrowNullPointerException(env, "file == null");
1005        return;
1006    }
1007    const jchar* str = env->GetStringCritical(fileName, 0);
1008    String8 fileName8;
1009    if (str) {
1010        fileName8 = String8(reinterpret_cast<const char16_t*>(str),
1011                            env->GetStringLength(fileName));
1012        env->ReleaseStringCritical(fileName, str);
1013    }
1014
1015    int fd = open(fileName8.string(), O_CREAT | O_WRONLY | O_NOFOLLOW, 0666);  /* -rw-rw-rw- */
1016    if (fd < 0) {
1017        fprintf(stderr, "Can't open %s: %s\n", fileName8.string(), strerror(errno));
1018        return;
1019    }
1020
1021    if (lseek(fd, 0, SEEK_END) < 0) {
1022        fprintf(stderr, "lseek: %s\n", strerror(errno));
1023    } else {
1024        dump_backtrace_to_file(pid, fd);
1025    }
1026
1027    close(fd);
1028}
1029
1030static jstring android_os_Debug_getUnreachableMemory(JNIEnv* env, jobject clazz,
1031    jint limit, jboolean contents)
1032{
1033    std::string s = GetUnreachableMemoryString(contents, limit);
1034    return env->NewStringUTF(s.c_str());
1035}
1036
1037/*
1038 * JNI registration.
1039 */
1040
1041static const JNINativeMethod gMethods[] = {
1042    { "getNativeHeapSize",      "()J",
1043            (void*) android_os_Debug_getNativeHeapSize },
1044    { "getNativeHeapAllocatedSize", "()J",
1045            (void*) android_os_Debug_getNativeHeapAllocatedSize },
1046    { "getNativeHeapFreeSize",  "()J",
1047            (void*) android_os_Debug_getNativeHeapFreeSize },
1048    { "getMemoryInfo",          "(Landroid/os/Debug$MemoryInfo;)V",
1049            (void*) android_os_Debug_getDirtyPages },
1050    { "getMemoryInfo",          "(ILandroid/os/Debug$MemoryInfo;)V",
1051            (void*) android_os_Debug_getDirtyPagesPid },
1052    { "getPss",                 "()J",
1053            (void*) android_os_Debug_getPss },
1054    { "getPss",                 "(I[J[J)J",
1055            (void*) android_os_Debug_getPssPid },
1056    { "getMemInfo",             "([J)V",
1057            (void*) android_os_Debug_getMemInfo },
1058    { "dumpNativeHeap",         "(Ljava/io/FileDescriptor;)V",
1059            (void*) android_os_Debug_dumpNativeHeap },
1060    { "getBinderSentTransactions", "()I",
1061            (void*) android_os_Debug_getBinderSentTransactions },
1062    { "getBinderReceivedTransactions", "()I",
1063            (void*) android_os_getBinderReceivedTransactions },
1064    { "getBinderLocalObjectCount", "()I",
1065            (void*)android_os_Debug_getLocalObjectCount },
1066    { "getBinderProxyObjectCount", "()I",
1067            (void*)android_os_Debug_getProxyObjectCount },
1068    { "getBinderDeathObjectCount", "()I",
1069            (void*)android_os_Debug_getDeathObjectCount },
1070    { "dumpNativeBacktraceToFile", "(ILjava/lang/String;)V",
1071            (void*)android_os_Debug_dumpNativeBacktraceToFile },
1072    { "getUnreachableMemory", "(IZ)Ljava/lang/String;",
1073            (void*)android_os_Debug_getUnreachableMemory },
1074};
1075
1076int register_android_os_Debug(JNIEnv *env)
1077{
1078    int err = memtrack_init();
1079    if (err != 0) {
1080        memtrackLoaded = false;
1081        ALOGE("failed to load memtrack module: %d", err);
1082    } else {
1083        memtrackLoaded = true;
1084    }
1085
1086    jclass clazz = env->FindClass("android/os/Debug$MemoryInfo");
1087
1088    // Sanity check the number of other statistics expected in Java matches here.
1089    jfieldID numOtherStats_field = env->GetStaticFieldID(clazz, "NUM_OTHER_STATS", "I");
1090    jint numOtherStats = env->GetStaticIntField(clazz, numOtherStats_field);
1091    jfieldID numDvkStats_field = env->GetStaticFieldID(clazz, "NUM_DVK_STATS", "I");
1092    jint numDvkStats = env->GetStaticIntField(clazz, numDvkStats_field);
1093    int expectedNumOtherStats = _NUM_HEAP - _NUM_CORE_HEAP;
1094    if ((numOtherStats + numDvkStats) != expectedNumOtherStats) {
1095        jniThrowExceptionFmt(env, "java/lang/RuntimeException",
1096                             "android.os.Debug.Meminfo.NUM_OTHER_STATS+android.os.Debug.Meminfo.NUM_DVK_STATS=%d expected %d",
1097                             numOtherStats+numDvkStats, expectedNumOtherStats);
1098        return JNI_ERR;
1099    }
1100
1101    otherStats_field = env->GetFieldID(clazz, "otherStats", "[I");
1102    hasSwappedOutPss_field = env->GetFieldID(clazz, "hasSwappedOutPss", "Z");
1103
1104    for (int i=0; i<_NUM_CORE_HEAP; i++) {
1105        stat_fields[i].pss_field =
1106                env->GetFieldID(clazz, stat_field_names[i].pss_name, "I");
1107        stat_fields[i].pssSwappable_field =
1108                env->GetFieldID(clazz, stat_field_names[i].pssSwappable_name, "I");
1109        stat_fields[i].privateDirty_field =
1110                env->GetFieldID(clazz, stat_field_names[i].privateDirty_name, "I");
1111        stat_fields[i].sharedDirty_field =
1112                env->GetFieldID(clazz, stat_field_names[i].sharedDirty_name, "I");
1113        stat_fields[i].privateClean_field =
1114                env->GetFieldID(clazz, stat_field_names[i].privateClean_name, "I");
1115        stat_fields[i].sharedClean_field =
1116                env->GetFieldID(clazz, stat_field_names[i].sharedClean_name, "I");
1117        stat_fields[i].swappedOut_field =
1118                env->GetFieldID(clazz, stat_field_names[i].swappedOut_name, "I");
1119        stat_fields[i].swappedOutPss_field =
1120                env->GetFieldID(clazz, stat_field_names[i].swappedOutPss_name, "I");
1121    }
1122
1123    return jniRegisterNativeMethods(env, "android/os/Debug", gMethods, NELEM(gMethods));
1124}
1125
1126}; // namespace android
1127