Initial Contribution

1 files changed, 244 insertions, 0 deletions

diff --git a/core/jni/android_database_SQLiteDebug.cpp b/core/jni/android_database_SQLiteDebug.cpp
new file mode 100644
index 0000000..916df35
--- /dev/null
+++ b/core/jni/android_database_SQLiteDebug.cpp
@@ -0,0 +1,244 @@
+/*
+ * 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