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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <JNIHelp.h>
#include <jni.h>
#include <utils/misc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <cutils/mspace.h>
#include <utils/Log.h>
#include <sqlite3.h>
// From mem_mspace.c in libsqlite
extern "C" mspace sqlite3_get_mspace();
// From sqlite.c, hacked in for Android
extern "C" void sqlite3_get_pager_stats(sqlite3_int64 * totalBytesOut,
sqlite3_int64 * referencedBytesOut,
sqlite3_int64 * dbBytesOut,
int * numPagersOut);
namespace android {
static jfieldID gTotalBytesField;
static jfieldID gReferencedBytesField;
static jfieldID gDbBytesField;
static jfieldID gNumPagersField;
#define USE_MSPACE 0
static void getPagerStats(JNIEnv *env, jobject clazz, jobject statsObj)
{
sqlite3_int64 totalBytes;
sqlite3_int64 referencedBytes;
sqlite3_int64 dbBytes;
int numPagers;
sqlite3_get_pager_stats(&totalBytes, &referencedBytes, &dbBytes,
&numPagers);
env->SetLongField(statsObj, gTotalBytesField, totalBytes);
env->SetLongField(statsObj, gReferencedBytesField, referencedBytes);
env->SetLongField(statsObj, gDbBytesField, dbBytes);
env->SetIntField(statsObj, gNumPagersField, numPagers);
}
static jlong getHeapSize(JNIEnv *env, jobject clazz)
{
#if !NO_MALLINFO
struct mallinfo info = mspace_mallinfo(sqlite3_get_mspace());
struct mallinfo info = dlmallinfo();
return (jlong) info.usmblks;
#elif USE_MSPACE
mspace space = sqlite3_get_mspace();
if (space != 0) {
return mspace_footprint(space);
} else {
return 0;
}
#else
return 0;
#endif
}
static jlong getHeapAllocatedSize(JNIEnv *env, jobject clazz)
{
#if !NO_MALLINFO
struct mallinfo info = mspace_mallinfo(sqlite3_get_mspace());
return (jlong) info.uordblks;
#else
return sqlite3_memory_used();
#endif
}
static jlong getHeapFreeSize(JNIEnv *env, jobject clazz)
{
#if !NO_MALLINFO
struct mallinfo info = mspace_mallinfo(sqlite3_get_mspace());
return (jlong) info.fordblks;
#else
return getHeapSize(env, clazz) - sqlite3_memory_used();
#endif
}
static int read_mapinfo(FILE *fp,
int *sharedPages, int *privatePages)
{
char line[1024];
int len;
int skip;
unsigned start = 0, size = 0, resident = 0;
unsigned shared_clean = 0, shared_dirty = 0;
unsigned private_clean = 0, private_dirty = 0;
unsigned referenced = 0;
int isAnon = 0;
int isHeap = 0;
again:
skip = 0;
if(fgets(line, 1024, fp) == 0) return 0;
len = strlen(line);
if (len < 1) return 0;
line[--len] = 0;
/* ignore guard pages */
if (line[18] == '-') skip = 1;
start = strtoul(line, 0, 16);
if (len > 50 && !strncmp(line + 49, "/tmp/sqlite-heap", strlen("/tmp/sqlite-heap"))) {
isHeap = 1;
}
if (fgets(line, 1024, fp) == 0) return 0;
if (sscanf(line, "Size: %d kB", &size) != 1) return 0;
if (fgets(line, 1024, fp) == 0) return 0;
if (sscanf(line, "Rss: %d kB", &resident) != 1) return 0;
if (fgets(line, 1024, fp) == 0) return 0;
if (sscanf(line, "Shared_Clean: %d kB", &shared_clean) != 1) return 0;
if (fgets(line, 1024, fp) == 0) return 0;
if (sscanf(line, "Shared_Dirty: %d kB", &shared_dirty) != 1) return 0;
if (fgets(line, 1024, fp) == 0) return 0;
if (sscanf(line, "Private_Clean: %d kB", &private_clean) != 1) return 0;
if (fgets(line, 1024, fp) == 0) return 0;
if (sscanf(line, "Private_Dirty: %d kB", &private_dirty) != 1) return 0;
if (fgets(line, 1024, fp) == 0) return 0;
if (sscanf(line, "Referenced: %d kB", &referenced) != 1) return 0;
if (skip) {
goto again;
}
if (isHeap) {
*sharedPages += shared_dirty;
*privatePages += private_dirty;
}
return 1;
}
static void load_maps(int pid, int *sharedPages, int *privatePages)
{
char tmp[128];
FILE *fp;
sprintf(tmp, "/proc/%d/smaps", pid);
fp = fopen(tmp, "r");
if (fp == 0) return;
while (read_mapinfo(fp, sharedPages, privatePages) != 0) {
// Do nothing
}
fclose(fp);
}
static void getHeapDirtyPages(JNIEnv *env, jobject clazz, jintArray pages)
{
int _pages[2];
_pages[0] = 0;
_pages[1] = 0;
load_maps(getpid(), &_pages[0], &_pages[1]);
// Convert from kbytes to 4K pages
_pages[0] /= 4;
_pages[1] /= 4;
env->SetIntArrayRegion(pages, 0, 2, _pages);
}
/*
* JNI registration.
*/
static JNINativeMethod gMethods[] =
{
{ "getPagerStats", "(Landroid/database/sqlite/SQLiteDebug$PagerStats;)V",
(void*) getPagerStats },
{ "getHeapSize", "()J", (void*) getHeapSize },
{ "getHeapAllocatedSize", "()J", (void*) getHeapAllocatedSize },
{ "getHeapFreeSize", "()J", (void*) getHeapFreeSize },
{ "getHeapDirtyPages", "([I)V", (void*) getHeapDirtyPages },
};
int register_android_database_SQLiteDebug(JNIEnv *env)
{
jclass clazz;
clazz = env->FindClass("android/database/sqlite/SQLiteDebug$PagerStats");
if (clazz == NULL) {
LOGE("Can't find android/database/sqlite/SQLiteDebug$PagerStats");
return -1;
}
gTotalBytesField = env->GetFieldID(clazz, "totalBytes", "J");
if (gTotalBytesField == NULL) {
LOGE("Can't find totalBytes");
return -1;
}
gReferencedBytesField = env->GetFieldID(clazz, "referencedBytes", "J");
if (gReferencedBytesField == NULL) {
LOGE("Can't find referencedBytes");
return -1;
}
gDbBytesField = env->GetFieldID(clazz, "databaseBytes", "J");
if (gDbBytesField == NULL) {
LOGE("Can't find databaseBytes");
return -1;
}
gNumPagersField = env->GetFieldID(clazz, "numPagers", "I");
if (gNumPagersField == NULL) {
LOGE("Can't find numPagers");
return -1;
}
return jniRegisterNativeMethods(env, "android/database/sqlite/SQLiteDebug",
gMethods, NELEM(gMethods));
}
} // namespace android
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